Transcript

65

ISSN(print) 1226-5012

J Korean Ophthalmic Opt Soc. 26(1):65-72, March 2021 http://dx.doi.org/10.14479/jkoos.2021.26.1.65

Line-Focusing Optical System of Laser Beam with Reverse-Biprism

Dong-Hee Lee*

Dept. of Visual Optics, Far East University, Professor, Eumseong 27601, Korea

(Received March 9, 2021: Revised March 18, 2021: Accepted March 19, 2021)

ยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยท

Purpose: This study aims to aid the development of a line-focusing optical system combining the emitting area beams

of two LD stacks to produce a single-line beam. Methods: By reversing the configuration of the biprism, which has been

used in ophthalmic optical devices, a new reverse-biprism could be defined, which could be used to develop an optical

system that combines the emitting area beams of the two LD stacks. Cylindrical lenses were introduced to allow the

combined emitting area beams to be converted into a line beam shape, and the vertex angle of the reverse-biprism was

used as an optimization variable for the uniformity of the irradiance of this line beam. Results: The newly designed line-

focusing optical system, which can combine the emitting area beams of two LDs to form a single-line beam, has

characteristics such as 1 mmร—40 mm (ยฑ10%) line beam shape size, less than 10% tolerance of the line beam irradiance

uniformity at a working distance of 280 mm, and less than 25% at a working distance of 280 ยฑ10 mm. Conclusions: By

applying the reverse-biprism redefined by reversing the base direction of the conventional biprism, we were able to design

a line beam focusing optical system that could combine the emitting area beams of two LD stacks to produce a single-line

beam. This reverse-biprism is expected to continue to play a role in the field of combining two isolated light sources in

the future.

Key words: Biprism, Reverse-biprism LD stack, Emitting area, Line-focusing optical system

ยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยทยท

์„œ ๋ก 

์•ˆ๊ฒฝ์žฌ๋ฃŒํ•™์—์„œ ์•ˆ๊ฒฝํ…Œ์˜ ์žฌ๋ฃŒ๋กœ ๋งŽ์ด ์–ธ๊ธ‰๋˜๋Š” ํ‹ฐํƒ„

(Ti)์€ ์ง€๊ตฌ์ƒ์—์„œ 10๋ฒˆ์งธ๋กœ ์กด์žฌ๋Ÿ‰์ด ๋งŽ์€ ์›์†Œ์ด๋‹ค. ๊ฒฝ๋Ÿ‰

์„ฑ(๋น„์ค‘ 4.51 g/cm2์œผ๋กœ ์ฒ ์˜ 60%, ๋™์˜ 50%), ๊ณ ๊ฐ•๋„(์ฒ ์˜

์•ฝ 2๋ฐฐ์˜ ๋น„๊ฐ•๋„), ๋‚ด์‹์„ฑ(์‚ฐ, ์•Œ์นผ๋ฆฌ ์ค‘์—์„œ ์ž˜ ๋ถ€์‹๋˜์ง€

์•Š์Œ)์ด ์šฐ์ˆ˜ํ•˜๊ณ , ํ•ญ๊ณต๊ธฐ์˜ ๊ตฌ์กฐ๊ตฌ์ฒด๋‚˜ ๊ฑด์กฐ๋ฌผ์˜ ์ง€๋ถ•์žฌ

๋ฅผ ๋น„๋กฏํ•ด ์‹œ๊ณ„์˜ ๋ฐด๋“œ๋‚˜ ํœด๋Œ€์ „ํ™”, ์•ˆ๊ฒฝํ…Œ ๋“ฑ์— ๊ณ ๊ธ‰ ์†Œ

์žฌ๋กœ ๋„๋ฆฌ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋‹ค.[1]

์•ˆ๊ฒฝํ…Œ ์ œ์ž‘์—์„œ์˜ ํ‹ฐํƒ„์€ ์ฃผ๋กœ ํ‹ฐํƒ„ํ•ฉ๊ธˆ ์ƒํƒœ๋กœ ์‚ฌ์šฉ๋˜

๋Š”๋ฐ, ํ‹ฐํƒ„ํ•ฉ๊ธˆ์˜ ํ’ˆ์งˆ์€ ์—ด์ฒ˜๋ฆฌ ๊ณผ์ •์— ์˜ํ•ด ๋งŽ์ด ์ขŒ์šฐ๋˜

๊ณ  ์žˆ๋‹ค. ํ‹ฐํƒ„์€ ๊ณต๊ธฐ ์ค‘์—์„œ ์—ด์ฒ˜๋ฆฌ๋ฅผ ํ•˜๋ฉด ์‚ฐ์†Œ์™€ ๋ฐ˜์‘ํ•˜

์—ฌ ํ‘œ๋ฉด์— ์‚ฐํ™”ํ”ผ๋ง‰์„ ํ˜•์„ฑ์‹œํ‚ค๊ธฐ ๋•Œ๋ฌธ์— ์ผ๋ฐ˜์ ์œผ๋กœ 10โˆ’5

torr ์ดํ•˜์˜ ๊ณ ์ง„๊ณต์ƒํƒœ์—์„œ ์—ด์ฒ˜๋ฆฌ๊ฐ€ ์ง„ํ–‰๋˜์–ด์•ผ ํ•œ๋‹ค.[1]

์š”์ฆˆ์Œ ์ด๋Ÿฌํ•œ ์ง„๊ณต ์ค‘์—์„œ์˜ ์—ด์ฒ˜๋ฆฌ๋ฅผ ์œ„ํ•ด ๋ ˆ์ด์ € ๋‹ค

์ด์˜ค๋“œ(laser diode) ๋น”์— ์˜ํ•œ ์—ด์ฒ˜๋ฆฌ ์žฅ์น˜๊ฐ€ ์†Œ๊ฐœ๋˜๊ณ  ์žˆ

๋‹ค. ๋ ˆ์ด์ € ๋น”์— ์˜ํ•œ ์—ด์ฒ˜๋ฆฌ ์žฅ์น˜๋Š” ์ˆœ๊ฐ„์ ์œผ๋กœ ๊ตญ์†Œ์ ์œผ

๋กœ ํ•„์š”ํ•œ ๋ถ€๋ถ„์„ ๊ณ ์˜จ ์ฒ˜๋ฆฌํ•  ์ˆ˜ ์žˆ๊ณ  ๊ณต๋žญ์‹œํ‚ฌ ์ˆ˜ ์žˆ๋Š”

์žฅ์ ์ด ์žˆ๋‹ค. ๊ณ ์˜จ์ฒ˜๋ฆฌ๋ฅผ ํ•˜๋ ค๋ฉด ๊ณ ์ถœ๋ ฅ์˜ ๋ ˆ์ด์ €๊ฐ€ ํ•„์š”

ํ•œ๋ฐ, MCCP(multi channel cooled package)[2,3] ๊ธฐ์ˆ ์„ ์‚ฌ

์šฉํ•˜์—ฌ ๋ ˆ์ด์ € ๋‹ค์ด์˜ค๋“œ๋ฅผ ๊ณ ์ถœ๋ ฅํ™” ์‹œํ‚ฌ ์ˆ˜ ์žˆ๋‹ค. ๊ทธ๋ฆฌ๊ณ 

Fig. 1๊ณผ ๊ฐ™์ด MCCP ๊ธฐ์ˆ ์ด ์ ์šฉ๋œ ๊ณ ์ถœ๋ ฅ LD ๋ฐ”(bar)๋ฅผ

์—ฌ๋Ÿฌ ์ธต ๊ฒน์ณ์„œ ํ•˜๋‚˜์˜ ๋”๋ฏธ(stack)๋กœ ๊ตฌ์„ฑํ•˜์—ฌ ์‚ฌ์šฉํ•จ์œผ

๋กœ์จ ์ถœ๋ ฅ์ด 5 KW ์ด์ƒ์ด ๋˜๋Š” ๋ ˆ์ด์ € ๊ด‘์›์„ ์‰ฝ๊ฒŒ ๊ตฌ์„ฑ

ํ•  ์ˆ˜ ์žˆ๊ฒŒ ๋˜์—ˆ๋‹ค. ๊ทธ๋Ÿฌ๋‚˜ ์ด๋Ÿฌํ•œ 5 KW ์ด์ƒ์ด ๋˜๋Š” ๊ณ 

์ถœ๋ ฅ์˜ LD ๋”๋ฏธ๋Š” ์ž์ฒด์ ์œผ๋กœ ๊ณ ์ถœ๋ ฅ ์—ด์ฒ˜๋ฆฌ ๊ด‘ํ•™๊ณ„ ๊ตฌ์„ฑ

ํ’ˆ์œผ๋กœ ์‚ฌ์šฉํ•˜๊ธฐ ์œ„ํ•ด ๊ฐœ๋ฐœํšŒ์‚ฌ์—์„œ ํŒ๋งค๋ฅผ ๊บผ๋ฆฌ๊ณ  ์žˆ๋‹ค.

๊ตฌ๋งคํ•œ๋‹ค๊ณ  ํ•ด๋„ 5 KW ์ •๋„์˜ ๊ณ ์ถœ๋ ฅ LD ๋”๋ฏธ 1๊ฐœ์˜ ๊ฐ€๊ฒฉ

์ด ์ถœ๋ ฅ์ด 2.5 KW ์ •๋„์ธ LD ๋”๋ฏธ 2๊ฐœ์˜ ๊ฐ€๊ฒฉ๋ณด๋‹ค 10๋ฐฐ

์ด์ƒ์˜ ๊ฐ€๊ฒฉ์ด ํ˜•์„ฑ๋˜์–ด ์žˆ๋‹ค๋ฉด, 2๊ฐœ์˜ ์ €์ถœ๋ ฅ์˜ LD ๋”๋ฏธ

๋ฅผ ์ด์šฉํ•˜์—ฌ ๋™์ผํ•œ ํšจ๊ณผ๋ฅผ ์ค„ ์ˆ˜ ์žˆ๋Š” ์—ด์ฒ˜๋ฆฌ ๊ด‘ํ•™๊ณ„๋ฅผ

๊ฐœ๋ฐœํ•˜๋Š” ๊ฒƒ์ด ํ›จ์”ฌ ๊ฐ€์น˜๊ฐ€ ์žˆ๋Š” ๊ด‘ํ•™๊ณ„์˜ ๊ฐœ๋ฐœ์ด ๋  ๊ฒƒ

์ด๋‹ค.

์ด์— ๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” 2๊ฐœ์˜ LD ๋”๋ฏธ๋ฅผ ์ง‘์†ํ•˜์—ฌ ํ•˜๋‚˜์˜

๋ผ์ธ ๋น”์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ๊ด‘ํ•™๊ณ„์˜ ๊ฐœ๋ฐœ๊ณผ์ •์„ ๋‹ค๋ฃจ๊ณ ์ž

ํ•œ๋‹ค. ์—ฌ๊ธฐ์—์„œ ์šฐ๋ฆฌ๋Š” ์•ˆ๊ด‘ํ•™ ์žฅ๋น„์— ๋งŽ์ด ์‚ฌ์šฉ๋˜๊ณ  ์žˆ์—ˆ

๋˜ ๊ด‘ํ•™ ๋ถ€ํ’ˆ์ธ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜(biprism)์ด ์–ด๋–ป๊ฒŒ ์‘์šฉ ๋ณ€ํ˜•

๋˜์–ด ์‚ฌ์šฉ๋˜๋Š”์ง€๋ฅผ ํ™•์ธํ•  ์ˆ˜ ์žˆ์„ ๊ฒƒ์ด๋‹ค.

<์ดˆ์ฒญ๋…ผ๋ฌธ>

*Corresponding author: Dong-Hee Lee, TEL: +82-043-880-3808, E-mail: [email protected]

Authors ORCID: https://orcid.org/0000-0001-7655-0058

66 Dong-Hee Lee

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

๋Œ€์ƒ ๋ฐ ๋ฐฉ๋ฒ•

1. ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜(biprism)๊ณผ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜(reverse-biprism)

์•ˆ๊ฒฝ๊ด‘ํ•™์—์„œ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜(biprism)์€ ๊ฐ๋ง‰๊ณก๋ฅ ๊ณ„์—์„œ ๋งˆ

์ด์–ด ์ƒ์„ ์ด์ค‘ํ™”ํ•˜๋Š”๋ฐ ์‚ฌ์šฉํ•˜๊ณ  ์žˆ๋‹ค. ์œ ์‚ฌ์•ˆ์ง„์˜ ์˜ํ–ฅ

์„ ๋ฐ›์ง€ ์•Š๊ณ  ์ด์ค‘ํ™”๋œ ๋งˆ์ด์–ด ์ƒ์ด ์ž˜ ๋ถ„๋ฆฌ๋˜๋Š”์ง€์— ์‚ฌ์šฉ

ํ•˜๋Š” ๊ด‘ํ•™๋ถ€ํ’ˆ์ด๋‹ค. ๋˜ํ•œ ์ด ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ๊ฑฐ๋ฆฌ์ธก์ •๊ธฐ์šฉ

์Šค์ฝ”ํ”„ ๊ฐœ๋ฐœ์— ์‚ฌ์šฉํ•œ ๋…ผ๋ฌธ์ด ๋ณธ ํ•™ํšŒ์ง€์— ๊ฒŒ์žฌ๋˜๊ธฐ๋„ ํ•˜

์˜€๋‹ค.[4,5] ์ด๋“ค ๋…ผ๋ฌธ์—์„œ๋Š” ๊ฐ๋ง‰๊ณก๋ฅ ๊ณ„, ์„ธ๊ทน๋“ฑํ˜„๋ฏธ๊ฒฝ ๋“ฑ์—

์„œ ์ด์šฉ๋˜๋Š” ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์›๋ฆฌ๋ฅผ ์ด์šฉํ•œ ๊ฑฐ๋ฆฌ์ธก์ •๊ธฐ๋ฅผ ์ œ

ํ’ˆ์— ์ ์šฉํ•˜๊ณ  ์žˆ์Œ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค. ์—ฌ๊ธฐ์— ์‚ฌ์šฉ๋˜๋Š” ํ”„

๋ฆฌ์ฆ˜์€ Fig. 1๊ณผ ๊ฐ™์€ ํ˜•์ƒ์œผ๋กœ ์ด๋ฅผ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์ด๋ผ ํ•œ๋‹ค.

์—ฌ๊ธฐ์—์„œ ๋– ์˜ค๋ฅด๋Š” ์—ญ๋ฐœ์ƒ์€ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์ด ๋งˆ์ด์–ด์ƒ์„

๋ถ„๋ฆฌํ•  ์ˆ˜ ์žˆ๋‹ค๋ฉด ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ๊ธฐ์ € ๋ฐฉํ–ฅ์„ ๋ฐ˜๋Œ€๋กœ ๊ตฌ์„ฑ

ํ•˜๋ฉด ๋ถ„๋ฆฌ๋œ ๊ด‘์›์„ ํ•˜๋‚˜๋กœ ํ•ฉ์น  ์ˆ˜ ์—†์„๊นŒ ํ•˜๋Š” ํŒ๋‹จ์ด

๋‹ค. ์ €์ž๋Š” ์ด๋ ‡๊ฒŒ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜(Fig. 2(b))์„ ๊ตฌ์„ฑํ•˜๋Š” ์ƒํ•˜

๋‘ ํ”„๋ฆฌ์ฆ˜์˜ ๊ธฐ์ € ๋ฐฉํ–ฅ์„ ๋ฐ˜๋Œ€๋กœ ํ•ด์„œ ๊ฒฐํ•ฉํ•œ ํ”„๋ฆฌ์ฆ˜(Fig.

3(b))์„ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜(reverse-biprism)์ด๋ผ๊ณ  ๋ช…๋ช…ํ•˜๊ฒ ๋‹ค.

๊ทธ ๊ตฌ์„ฑ์€ Fig. 3๊ณผ ๊ฐ™๋‹ค.

์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ์ด์šฉํ•˜์—ฌ 2๊ฐœ์˜ LD ๋”๋ฏธ๋ฅผ ์ง‘์†ํ•˜

์—ฌ ์—ด์ฒ˜๋ฆฌ์šฉ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ์ƒˆ๋กœ์šด ๊ด‘

ํ•™๊ณ„์˜ ๊ฐœ๋ฐœ์„ ๋‹ค๋ฃจ๋Š” ๊ณผ์ •์„ ์ €์ž๋Š”

- 1๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ์„ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์œผ๋กœ ๋งŒ๋“ค๊ธฐ

์œ„ํ•œ ์„ค๊ณ„

- 2๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ์„ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์œผ๋กœ ํ•ฉ์น˜๋Š”

๋ฌธ์ œ ๊ฒ€ํ† 

- 2๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ ์‚ฌ์ด์˜ ๊ฐ„๊ทน์„ ์—†์• ๊ธฐ ์œ„ํ•œ ์—ญ

๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ๋„์ž…

์˜ 3๋‹จ๊ณ„๋กœ ์ง„ํ–‰ํ•˜๊ณ ์ž ํ•œ๋‹ค.

2. 1๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ์„ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์œผ๋กœ ๋งŒ๋“ค๊ธฐ

์œ„ํ•œ ์„ค๊ณ„

๊ฐœ๋ฐœ์˜๋ขฐ์ž๊ฐ€ ์š”๊ตฌํ•œ ์„ค๊ณ„์˜ ์ดˆ๊ธฐ ์กฐ๊ฑด์€ Table 1๊ณผ ๊ฐ™

Fig. 1. The LD bar structure and the composition of a single LD stack of multiple LD bars. This figure was revised and

cited from references 2 & 3.

Fig. 2. 3D biprism configuration: (a) transparent projection

view; (b) sectional view.

Fig. 3. 3D reverse-biprism configuration: (a) transparent

projection view; (b) sectional view.

Table 1. Design specifications of the line-focusing optical

system for the LD stacks demanded by the user

LD wavelength 975 nm

Emitting area per one LD stack 10 mmยฑ40 mm

Power per one LD stack 2.5 KW

Working distance 280 mm (ยฑ10 mm)

Wanted dimension of line beam 1 mmร—40 mm (ยฑ10%)

Uniformity tolerance for long

axis direction of line beam

< ยฑ25% @ WD 280 mm ยฑ10 mm

< ยฑ10% @ WD 280 mm

Number of LD stacks used for

equipment manufacturing2 ea

โ‰ˆ

โ‰ˆ

Line-Focusing Optical System of Laser Beam with Reverse-Biprism 67

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

๋‹ค. LD ๋”๋ฏธ์˜ ๋ฐœ์ง„ ํŒŒ์žฅ์„ 975ยฑ2 nm๋กœ ํ•˜์—ฌ CodeV[6] ๋ฐ

LightTools[7] ํ”„๋กœ๊ทธ๋žจ์„ ์‚ฌ์šฉํ•˜์—ฌ ๋ผ์ธ ๋น” ๊ด‘ํ•™๊ณ„ ์ตœ์ ํ™”

์„ค๊ณ„๋ฅผ ์ง„ํ–‰ํ•˜์˜€๋‹ค.

Fig. 4์™€ ๊ฐ™์€ ๊ตฌ์กฐ์˜ ๋‹จ์ผ LD ๋”๋ฏธ๋Š” LD์˜ ๋ฐœ๊ด‘์˜์—ญ

์„ 10 mmร—40 mm๋กœ ๊ฐ–๋Š”๋‹ค. Fig. 1 (a)์˜ LD ๋ฐ”๊ฐ€ 150 W

์˜ ์ถœ๋ ฅ์„ ๊ฐ–๋Š”๋‹ค๋ฉด 17๊ฐœ์˜ LD ๋ฐ”๋กœ ๊ตฌ์„ฑ๋œ Fig. 4์˜ ํ•˜๋‚˜

์˜ LD ๋”๋ฏธ๋Š” ์•ฝ 2.5 KW์˜ ์ถœ๋ ฅ์„ ๊ฐ–๋Š”๋‹ค. ์ด๋Ÿฌํ•œ LD ๋”

๋ฏธ 2๊ฐœ๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ 5 KW์ถœ๋ ฅ์˜ ๊ธฐ์กด ๋ฐฉ์‹์— ์˜ํ•œ ๋ผ์ธ ํ˜•

์ƒ์˜ ๋ ˆ์ด์ € ๋น” ์ง‘์†๊ด‘ํ•™๊ณ„๋ฅผ ๋งŒ๋“ค๊ธฐ ์œ„ํ•ด์„œ๋Š” 1๊ฐœ์˜ LD

๋”๋ฏธ๊ฐ€ 20 mmร—1 mm์˜ ์ง‘์†์„ ํ•˜๋„๋ก ์„ค๊ณ„๋ฅผ ํ•˜์—ฌ์•ผ ํ•œ๋‹ค.

๋”ฐ๋ผ์„œ ์šฐ์„  1๊ฐœ์˜ LD ๋”๋ฏธ์˜ 10 mmร—40 mm์˜ ๋ฐœ๊ด‘

์˜์—ญ์„ ์–ด๋–ป๊ฒŒ ํ•˜์—ฌ 20 mmร—1 mm์˜ ๋ผ์ธ ๋น”์œผ๋กœ ๋งŒ๋“ค ์ˆ˜

์žˆ๋Š”์ง€๋ฅผ ์‚ดํŽด๋ณด์ž. ์ฆ‰ 1๊ฐœ์˜ LD ๋”๋ฏธ 10 mmร—40 mm์˜

๋ฐœ๊ด‘ ์˜์—ญ์„ Fig. 4์™€ ๊ฐ™์ด ๋ฐฐ์น˜ํ•˜์˜€๋‹ค๊ณ  ๋ณผ ๋•Œ ๊ฒฐ๊ตญ

20 mmร—1 mm์˜ ๋ผ์ธ ๋น”์„ ๋งŒ๋“œ๋Š” ๋ฐฉ๋ฒ•์€ x์ถ• ๋ฐฉํ–ฅ์œผ๋กœ๋Š”

2๋ฐฐ ํ™•๋Œ€ํ•˜๋Š” ๊ด‘ํ•™๊ณ„๋ฅผ, y์ถ• ๋ฐฉํ–ฅ์œผ๋กœ๋Š” ์ง‘์†๊ด‘ํ•™๊ณ„๋ฅผ ์„ค

๊ณ„ํ•˜์—ฌ ๋ฐฐ์น˜ํ•˜๋Š” ๊ฒƒ์ž„์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค.

x์ถ• ๋ฐฉํ–ฅ์œผ๋กœ 2๋ฐฐ ํ™•๋Œ€ ๊ด‘ํ•™๊ณ„๋ฅผ ๊ฐ€์ง€๊ธฐ ์œ„ํ•ด์„œ๋Š” ํšก๋ฐฐ

์œจ[9,10] mฮฒ = โˆ’ โˆ’2.0 X์ธ ๋ฌผ์ฒด๊ฑฐ๋ฆฌ s์™€ ์ƒ๊ฑฐ๋ฆฌ s'์˜ ์„ค์ •์ด

ํ•„์š”ํ•œ๋ฐ ์—ฌ๊ธฐ์—๋Š” y์ถ• ๋ฐฉํ–ฅ์˜ ์ง‘์†๊ด‘ํ•™๊ณ„๋ฅผ ์œ„ํ•œ ๋‹ค์ˆ˜๊ฐœ

์˜ x์ถ• ์‹ค๋ฆฐ๋”๋ Œ์ฆˆ, ๋ณดํ˜ธ์šฉ ์œˆ๋„์šฐ, ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ๋Œ€์ฒด

ํ•˜๊ธฐ ์œ„ํ•œ ๊ฐ€์ƒ์˜ ํ‰๋ช… ๋ Œ์ฆˆ์˜ ๋‘๊ป˜์™€ ๊ตด์ ˆ๋ฅ  ๋“ฑ์ด ๊ณ ๋ ค

๋˜์–ด ์„ค์ •๋œ๋‹ค. ์‹ค์ œ ์„ค๊ณ„์—์„œ๋Š” ๊ฐ๊ฐ์˜ ๋ Œ์ฆˆ์˜ ๋‘๊ป˜์™€ ์ด

๋“ค ์‚ฌ์ด์˜ ๊ฑฐ๋ฆฌ๋ฅผ ๋จผ์ € ์ ์ ˆํ•˜๊ฒŒ ์„ค์ •ํ•˜์—ฌ ๋ฐฐ์น˜ํ•˜์˜€๊ณ , ๊ฐ

๊ฐ ๋ Œ์ฆˆ ์‚ฌ์ด์˜ ๊ฑฐ๋ฆฌ์™€ y์ถ• ์‹ค๋ฆฐ๋”๋ Œ์ฆˆ์˜ ๋‘ ๊ณก๋ฅ ๊ฐ’์„ ๋ณ€

์ˆ˜๋กœํ•˜์—ฌ Table 1์—์„œ ์ฃผ์–ด์ง„ ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm์™€ ํšก๋ฐฐ์œจ

mฮฒ = โˆ’2.0 X์„ ์ œํ•œ์กฐ๊ฑด์œผ๋กœ ํ•˜์—ฌ ์ตœ์ ํ™”๋ฅผ ์ง„ํ–‰ํ•˜์˜€๋‹ค.

๋˜ํ•œ y์ถ• ๋ฐฉํ–ฅ์˜ ์ง‘์†๊ด‘ํ•™๊ณ„๋Š” ๋ณดํ˜ธ์šฉ ์œˆ๋„์šฐ์—์„œ ๊ฒฐ์ƒ

๋ฉด๊นŒ์ง€์˜ ๊ฑฐ๋ฆฌ(BFL: back focal length)๊ฐ€ 280 mm์ด๊ณ  ์œ 

ํ•œ๊ด‘์„ ์ˆ˜์ฐจ๊ฐ€ ์ตœ์†Œ๊ฐ€ ๋˜๋„๋ก ์ตœ์ ํ™”๋ฅผ ์ง„ํ–‰ํ•˜์˜€๋‹ค. ์ตœ์ 

ํ™”๋ฅผ ์ง„ํ–‰ํ•œ ๊ฒฐ๊ณผ y์ถ• ๋ฐฉํ–ฅ์˜ ์ง‘์†๊ด‘ํ•™๊ณ„๋Š” +๊ตด์ ˆ๋ ฅ๊ณผ โˆ’๊ตด

์ ˆ๋ ฅ์˜ x์ถ• ์‹ค๋ฆฐ๋” ๋ Œ์ฆˆ ์กฐํ•ฉ์œผ๋กœ ์ตœ์ ํ™”๋˜์—ˆ๋Š”๋ฐ ์ด ๊ด‘

ํ•™๊ณ„์˜ ์œ ํ•œ๊ด‘์„ ์ˆ˜์ฐจ ๊ทธ๋ž˜ํ”„๋Š” Fig. 5์™€ ๊ฐ™๋‹ค. Fig. 5์—์„œ

๋ณด๋ฉด y์ถ• ๋ฐฉํ–ฅ์œผ๋กœ 20 mm ๋ฐœ๊ด‘์˜์—ญ์˜ LD ๋”๋ฏธ์˜ ๋ ˆ์ด์ €

๋น”์ด ์ง‘์†๋˜์–ด ํญ์ด 0.02 mm ์ด๋‚ด๋กœ ์ž˜ ์ œ์–ด๋  ๊ฒƒ์ž„์„ ํ™•

์ธํ•  ์ˆ˜ ์žˆ๋Š”๋ฐ ์ด๋Š” ์‚ฌ์šฉ์ž๊ฐ€ ์š”๊ตฌํ•œ ์ง‘์†๋œ ๋ผ์ธ ๋น”์˜

ํญ 1 mm ์œ ์ง€ ์กฐ๊ฑด์„ ์ถฉ๋ถ„ํžˆ ๋งŒ์กฑํ•  ์ˆ˜ ์žˆ์Œ์„ ํ™•์ธํ•  ์ˆ˜

์žˆ๋‹ค.

์ด๋Ÿฌํ•œ ๋ฐฉ์‹์œผ๋กœ 1๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ์„ ํ•˜๋‚˜์˜ ๋ผ์ธ

๋น”์œผ๋กœ ๋งŒ๋“ค๊ธฐ ์œ„ํ•œ ๊ด‘ํ•™๊ณ„์˜ ์ตœ์ข… ์„ค๊ณ„ ๋ฐ์ดํ„ฐ๋Š” Table

2์— ์ œ์‹œ๋˜์–ด ์žˆ๋‹ค. ์—ฌ๊ธฐ์—๋Š” x์ถ•, y์ถ• ๋ฐฉํ–ฅ์˜ ๊ฒฐ์ƒ ๋ฐฉ์‹

์ด ๋‹ค๋ฅด๊ธฐ ๋•Œ๋ฌธ์— ๊ด‘ํ•™๊ณ„ ์„ค๊ณ„์—๋Š” ๊ฐ๊ฐ y์ถ•, x์ถ• ์‹ค๋ฆฐ๋”

๋ Œ์ฆˆ๊ฐ€ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ์Œ์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค. ์ด ์‹ค๋ฆฐ๋” ๋ Œ์ฆˆ์˜ ์ดˆ

์ž๋Š” ๊ณ ์ถœ๋ ฅ์˜ ๋ ˆ์ด์ € ๋น”์— ์ฃผ๋กœ ์‚ฌ์šฉํ•˜๋Š” Fused silica[11]

๋ฅผ ์‚ฌ์šฉํ•˜์˜€๋‹ค.

Table 2์˜ ์„ค๊ณ„ ๋ฐ์ดํ„ฐ์— ์˜ํ•œ x-z ๋ฐ y-z๋ฉด์—์„œ์˜ ๊ด‘ํ•™

๊ณ„ ๋‹จ๋ฉด๋„์™€ ๊ด‘์„  ์ถ”์ ์„ ๊ทธ๋ ค๋ณด๋ฉด Fig. 6์™€ Fig. 7๊ณผ ๊ฐ™์ด

๋‚˜ํƒ€๋‚œ๋‹ค. Fig. 6์—์„œ๋Š” x์ถ• ๋ฐฉํ–ฅ์˜ ๋ฐœ๊ด‘์˜์—ญ ํญ y = 10 mm

๊ฐ€ ๊ฒฐ์ƒ๋ฉด์—์„œ ๊ฒฐ์ƒ ํญ y' = โˆ’20 mm๋กœ ๋‚˜ํƒ€๋‚œ๋‹ค. ์ฆ‰ ํšก๋ฐฐ

์œจmฮฒ = = โˆ’2.0 X์ธ ๊ด‘ํ•™๊ณ„์ธ ๊ฒƒ์ด๋‹ค.[9,10]

Fig. 7์—์„œ๋Š” y์ถ• ๋ฐฉํ–ฅ์˜ ๋ฐœ๊ด‘์˜์—ญ ๋†’์ด 40 mm๊ฐ€ ๊ด‘ํ•™

๊ณ„์˜ ์ดˆํ‰๋ฉด(๊ฒฐ์ƒ๋ฉด)์—์„œ ์ง‘์†๋˜๊ณ  ์žˆ์Œ์„ ๋ณด์—ฌ ์ค€๋‹ค. Fig.

5์˜ ์œ ํ•œ๊ด‘์„ ์ˆ˜์ฐจ ๊ทธ๋ž˜ํ”„์—์„œ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋Š” ๋ฐ”์™€ ๊ฐ™์ด

์ด ์ง‘์† ๋น”์˜ ํญ์€ ยฑ0.02 mm ์ด๋‚ด๋กœ ์ž˜ ์ œ์–ด๋˜๊ณ  ์žˆ์Œ์„

ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค.

3. 2๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ์„ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์œผ๋กœ ๊ฒฐํ•ฉํ•˜๋Š”

๋ฌธ์ œ ๊ฒ€ํ† 

์ผ๋ฐ˜์ ์œผ๋กœ Fig. 6, 7๊ณผ ๊ฐ™์ด ์„ค๊ณ„๋œ ๊ด‘ํ•™๊ณ„์— 2๊ฐœ์˜ LD

๋”๋ฏธ๋ฅผ ๋ฐœ๊ด‘๋ฉด์˜ ์žฅ์ถ•์ด y์ถ• ๋ฐฉํ–ฅ, ๋ฐœ๊ด‘๋ฉด์˜ ๋ฒ•์„ ์ด z์ถ•์ด

๋˜๋„๋ก ๋‚˜๋ž€ํ•˜๊ฒŒ ๋ฐฐ์น˜ํ•˜์—ฌ ๊ฐ๊ฐ์˜ ๋ผ์ธ ๋น”์„ ๋ชจ์•„๋ณด๋ฉด ๋‘

LD ๋”๋ฏธ ๋ฐœ๊ด‘๋ฉด์˜ ๋‹จ์ถ• ๋ฐฉํ–ฅ์œผ๋กœ ์ ‘๊ทผํ•  ์ˆ˜ ์—†๋Š” ๊ฐ„๊ทน์ด

์กด์žฌํ•˜๊ฒŒ ๋œ๋‹ค. ํ˜„์žฌ ์‚ฌ์šฉํ•˜๊ณ ์ž ํ•˜๋Š” Fig. 4์˜ LD ๋”๋ฏธ

sโ€ฒ

s---

yโ€ฒ

y----

Fig. 4. An LD stack model of DILAS Diode Laser, Inc.,

with a light emitting area of 10 mm ร— 40 mm.[8]

Fig. 5. Finite ray aberration of y-axis direction line-focusing

optical system.

68 Dong-Hee Lee

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

๋กœ๋Š” ์ด ๊ฐ„๊ทน์„ ์ตœ์†Œ 3.5 mm ์ด์ƒ ๋˜๊ฒŒ ํ•ด์•ผ๋งŒ ๋‘ LD ๋”

๋ฏธ๋ฅผ ๋‚˜๋ž€ํ•˜๊ฒŒ ๋ฐฐ์น˜ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ์ด๋ ‡๊ฒŒ ๋˜๋ฉด Fig. 8์˜

(a)์— ๋‚˜ํƒ€๋‚˜์žˆ๋Š” ๊ฒƒ๊ณผ ๊ฐ™์ด ๋ฌผ์ฒด ๊ณต๊ฐ„์—์„œ์˜ 3.5 mm ๊ฐ„

๊ทน์ด ๊ทธ๋Œ€๋กœ ์ƒ๊ณต๊ฐ„์œผ๋กœ ์ „๋‹ฌ๋˜์–ด ๋‘ LD ๋”๋ฏธ์˜ ๊ฒฐ์ƒ๋ฉด

์—์„œ์˜ ๊ฐ๊ฐ์˜ ํญ 1 mm ๊ธธ์ด 20 mm์˜ ๋ผ์ธ ๋น” ์‚ฌ์ด์— ๊ฐ„

๊ทน์ด 7 mm(3.5 mmร—2๋ฐฐ) ์กด์žฌํ•˜๊ฒŒ ๋˜์–ด ์—ฐ๊ฒฐ๋œ 40 mm ๋ผ

์ธ ๋น”์„ ํ˜•์„ฑํ•  ์ˆ˜ ์—†๊ฒŒ ๋œ๋‹ค.

์—ฌ๊ธฐ์„œ ์ œ๊ธฐ๋œ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•ด์„œ๋Š” ์ƒˆ๋กœ์šด ๊ด‘ํ•™

๋ถ€ํ’ˆ์˜ ๋„์ž…์ด ํ•„์š”ํ•˜๋‹ค๋Š” ๊ฒƒ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค.

4. 2๊ฐœ์˜ LD ๋”๋ฏธ์˜ ์ถœ๋ ฅ ์‚ฌ์ด์˜ ๊ฐ„๊ทน์„ ์—†์• ๊ธฐ ์œ„ํ•œ ์—ญ๋ฐ”

์ดํ”„๋ฆฌ์ฆ˜์˜ ๋„์ž…

์•ˆ๊ฒฝ๊ด‘ํ•™ ๊ธฐ๊ธฐ์— ์‹œ์šฉ๋˜๋Š” ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ํ˜•์ƒ์€ Fig. 2

์— ์ œ์‹œ๋œ ๋ฐ”๊ฐ€ ์žˆ๋Š”๋ฐ, ์ด ํ”„๋ฆฌ์ฆ˜์€ ์ผ๋ฐ˜ ๋‘ ๊ฐœ์˜ ํ”„๋ฆฌ์ฆ˜

๋ Œ์ฆˆ๋ฅผ ๊ธฐ์ € ๋ถ€๋ถ„์„ ์„œ๋กœ ๋งˆ์ฃผ ๋ณด๊ฒŒ ๊ฒฐํ•ฉํ•˜์—ฌ ๊ตฌ์„ฑํ•˜๊ณ 

์žˆ๋‹ค. ๊ทธ ์—ญํ• ์€ ์œ—๋ถ€๋ถ„์œผ๋กœ ์ž…์‚ฌํ•˜๋Š” ๊ด‘์„ ๋“ค์˜ ๊ฒฝ๋กœ๋ฅผ ์•„

Table 2. Optimized design data of the line-focusing optical system designed by traditional methods (units: mm)

Surface # Y Radius X Radius Thickness Glass Y Semi-Apert X Semi-Apert

Object Infinity Infinity 16.00

1 Infinity Infinity 4.00 SILICA 25.00 25.00

2 Infinity Infinity 67.00 25.00 25.00

3 Infinity 95.196 10.00 SILICA 30.00 26.00

4 Infinity Infinity 31.00 30.00 26.00

5 Infinity โˆ’153.784 5.00 SILICA 30.00 26.00

6 Infinity Infinity 18.00 30.00 26.00

Stop 90.874 Infinity 20.00 SILICA 30.00 26.00

8 -106.617 Infinity 8.00 30.00 26.00

9 Infinity Infinity 10.00 SILICA 30.00 26.00

10 Infinity Infinity 20.00 30.00 26.00

11 Infinity Infinity 3.00 SILICA 30.00 26.00

12 Infinity Infinity 270.00 30.00 26.00

13 Infinity Infinity 0.00 receiver_67

14 Infinity Infinity 10.00

15 Infinity Infinity 0.00 receiver_72

16 nfinity Infinity 10.00

Image nfinity Infinity 0.00 receiver_77

Fig. 6. Finite ray tracing of the optimized line-focusing optical system showing in the x-z plane.

Fig. 7. Ray tracing of the optimized line-focusing optical system showing in the y-z plane.

Line-Focusing Optical System of Laser Beam with Reverse-Biprism 69

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

๋ž˜๋กœ, ์•„๋žซ๋ถ€๋ถ„์œผ๋กœ ์ž…์‚ฌํ•˜๋Š” ๊ด‘์„ ๋“ค์˜ ๊ฒฝ๋กœ๋ฅผ ์œ„๋กœ ํŽธํ–ฅ

์‹œํ‚ค๋Š” ์—ญํ• ์„ ํ•˜๋Š” ํ”„๋ฆฌ์ฆ˜์ด๊ณ  ์ฃผ๋กœ ์•ˆ๊ฒฝ๊ด‘ํ•™ ๋ถ„์•ผ์—์„œ

๋Š” ๋งˆ์ด์–ด ์ƒ์„ ์ด์ค‘ํ™”ํ•˜๋Š”๋ฐ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋Š” ๋ถ€ํ’ˆ์ด๋‹ค.

๋งŒ์•ฝ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ Fig. 8์˜ (a)์˜ ํ‰๋ฉด๋ Œ์ฆˆ 1์— ๋Œ€์ฒดํ•˜

์—ฌ ์‚ฌ์šฉํ•œ๋‹ค๋ฉด ๊ฒฐ์ƒ๋ฉด์—์„œ์˜ ๋‘ ๋ผ์ธ ๋น” ์‚ฌ์ด์˜ ๊ฐ„๊ทน์ด ๋”

์šฑ ๋ฒŒ์–ด์งˆ ๊ฒƒ์ด๋ผ๋Š” ์ถ”์ •์„ ํ•  ์ˆ˜ ์žˆ๋‹ค. ๊ทธ๋ ‡๋‹ค๋ฉด ๋ฐ”์ดํ”„

๋ฆฌ์ฆ˜์„ ์ด๋ฃจ๋Š” ์œ„ ์•„๋ž˜ ๋‘ ํ”„๋ฆฌ์ฆ˜์˜ ๊ธฐ์ € ๋ฐฉํ–ฅ์„ ๊ฑฐ๊พธ๋กœ

๊ฒฐํ•ฉํ•œ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ Fig. 8์˜ (a)์˜ ํ‰๋ฉด๋ Œ์ฆˆ 1์— ๊ต์ฒด

์‚ฌ์šฉํ•œ๋‹ค๋ฉด ๊ฒฐ์ƒ๋ฉด์—์„œ์˜ ๋‘ ๋ผ์ธ ๋น” ์‚ฌ์ด์˜ ๊ฐ„๊ทน์„ ์ค„์—ฌ

์ค„ ์ˆ˜ ์žˆ๋‹ค๋Š” ์ถ”์ •์ด ๊ฐ€๋Šฅํ•˜๋‹ค. ์ด๋Ÿฌํ•œ ์—ญ๋ฐœ์ƒ์˜ ํ”„๋ฆฌ์ฆ˜๋ Œ

์ฆˆ ๋ถ€ํ’ˆ์€ ๋ณธ ๋…ผ๋ฌธ์—์„œ ์ฒ˜์Œ ์‹œ๋„๋˜๋Š” ๊ฒƒ์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ๋„์ž…ํ•˜์—ฌ ๋ผ์ธ ๋น”์„ ๋ฐœ์ƒ์‹œํ‚ค๋Š” ๊ด‘

ํ•™๊ณ„ ์„ค๊ณ„์˜ ์ตœ์ ํ™”๋ฅผ ์‹œ๋„ํ•˜๋Š” ์ž‘์—…์—๋Š” 1๊ฐœ์˜ ๋ณ€์ˆ˜๋งŒ์ด

์กด์žฌํ•œ๋‹ค. ์ฆ‰, ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ๊ตด์ ˆ๋ฅ ์ด ๊ณ ์ถœ๋ ฅ์˜ ๋ ˆ์ด์ €

๋น”์˜ ์†Œ์žฌ๋กœ ์ ํ•ฉํ•œ fused silica๋กœ ๊ณ ์ •๋œ๋‹ค๋ฉด ์—ญ๋ฐ”์ดํ”„๋ฆฌ

์ฆ˜์„ ์ด๋ฃจ๋Š” ์ƒํ•˜ ํ”„๋ฆฌ์ฆ˜์˜ ์ •๊ฐ๋งŒ ๋ณ€์ˆ˜๊ฐ€ ๋œ๋‹ค. ์ด์— ์ €

Fig. 8. Ray tracings of the optimized line-focusing optical system, with two LD stacks used in parallel, showing in the

x-z plane (a) and the y-z plane (b).

Fig. 9. Illustration showing the geometry of the reverse-biprism optimized to remove the gap between the line beams.

Fig. 10. Ray tracings of the optimized line-focusing optical system by a reverse-biprism adopted to eliminate the gap

between two line beams, showing in the x-z plane (a) and the y-z plane (b).

70 Dong-Hee Lee

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

์ž๋Š” ์ด 1๊ฐœ์˜ ๋ณ€์ˆ˜์˜ ๋ณ€ํ™”์— ๋”ฐ๋ฅธ ๊ฒฐ์ƒ๋ฉด ์ „ํ›„์—์„œ์˜ ๋ฐฉ

์‚ฌ์กฐ๋„ ๋ณ€ํ™”์˜ ๊ด€์ฐฐ์ด ์šฉ์ดํ•œ LightTools๊ฐ€ ์—ด์ฒ˜๋ฆฌ์šฉ ๋ผ์ธ

๋น” ํ˜•์„ฑ ๊ด‘ํ•™๊ณ„์˜ ์ตœ์ ํ™” ์ž‘์—…์— ์ ํ•ฉํ•œ s/w๋กœ ํŒ๋‹จํ•˜์—ฌ

๋งˆ์ง€๋ง‰ ๋‹จ๊ณ„์˜ ์ตœ์ ํ™” ์ž‘์—…์— ์‚ฌ์šฉํ•˜์˜€๋‹ค. ์ตœ์ ํ™” ์ž‘์—…์˜

๊ตฌ์†์กฐ๊ฑด์€ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์ค‘์‹ฌ๋‘๊ป˜๋ฅผ 4.0 mm๋กœ ์œ ์ง€ํ•˜

๋Š” ๊ฒƒ, ๋‘ ๋ผ์ธ ๋น”์ด ์—ฐ๊ฒฐ๋˜์–ด ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm์—์„œ

40 mm ๋ผ์ธ ๋น”์˜ ๊ธธ์ด๋ฅผ ์œ ์ง€ํ•˜๋Š” ๊ฒƒ, ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm

ยฑ10 mm ์ด๋‚ด์—์„œ ๋ฐฉ์‚ฌ์กฐ๋„์˜ ๊ท ์ผ๋„ ๋ฒ”์œ„๊ฐ€ ยฑ25% ์ด๋‚ด

์— ๋“ค๋„๋ก ํ•˜๋Š” ๊ฒƒ ๋“ฑ 3๊ฐ€์ง€๋กœ ํ•˜์˜€๋‹ค. ์ตœ์ ํ™”๋ฅผ ์ง„ํ–‰ํ•œ ๊ฒฐ

๊ณผ Fig. 9์— ๋ณด์ธ ๋ฐ”์™€ ๊ฐ™์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์ •๊ฐ์€ 6.2o๊ฐ€

์ตœ์ ํ™”๋œ ๊ฐ’์ž„์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

Fig. 10์€ ์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์ด ์ฑ„ํƒ๋œ ๊ด‘ํ•™๊ณ„์— ์˜ํ•œ ๊ด‘

์„  ์ถ”์ ๋„๋ฅผ ๋ณด์—ฌ์ฃผ๊ณ  ์žˆ๋‹ค. Fig. 10(a)์—์„œ ๋ณด๋ฉด ์œ„, ์•„๋ž˜

์˜ ๋‘ LD ๋”๋ฏธ์—์„œ ์ถœ๋ฐœํ•œ ๋‘ ๋ ˆ์ด์ € ๋น”์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜

์— ์˜ํ•ด ์œ„ ์•„๋ž˜๋กœ ์ ์  ๋” ๋ฉ€์–ด์ง€๋Š” ๋ฐฉํ–ฅ์œผ๋กœ ์ง„ํ–‰๋˜์–ด

y์ถ• ์‹ค๋ฆฐ๋” ๋ Œ์ฆˆ์— ์˜ํ•ด ์„œ๋กœ ๋ถ„๋ฆฌ๋˜์–ด y์ถ• ์‹ค๋ฆฐ๋” ๋ Œ์ฆˆ

์˜ ์ดˆํ‰๋ฉด์— ์œ„ ์•„๋ž˜๋กœ ์ง‘์†๋œ๋‹ค. ์ด ์ดˆํ‰๋ฉด ์ดํ›„์—๋Š” ์ง‘

์†๋œ ๋‘ ๋น”์ด ๋‹ค์‹œ ๋ฐœ์‚ฐํ•˜๋ฉด์„œ ์ง„ํ–‰ํ•˜๊ฒŒ ๋˜๋Š”๋ฐ, ์•„๋ž˜๋กœ

ํ–ฅํ•˜๋Š” ๋ฐœ์‚ฐ ๋น”์˜ ์œ„์ชฝ ๋ถ€๋ถ„๊ณผ ์œ„๋กœ ํ–ฅํ•˜๋Š” ๋ฐœ์‚ฐ ๋น”์˜ ์•„

๋ž˜์ชฝ ๋ถ€๋ถ„์ด ๋ผ์ธ ๋น” ๊ฒฐ์ƒ๋ฉด์—์„œ ์ค‘์ฒฉ๋˜๊ฒŒ ํ•œ๋‹ค. ์ด ์ค‘์ฒฉ

์ •๋„๋Š” ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์ •๊ฐ์— ์˜ํ•ด ๊ฒฐ์ •๋˜๋Š”๋ฐ ๋ณธ ๋…ผ๋ฌธ

์—์„œ๋Š”, Table 1๊ณผ ๊ฐ™์€ ๊ฐœ๋ฐœ์˜๋ขฐ์ž์˜ ์š”๊ตฌ์กฐ๊ฑด์„ ์ถฉ์กฑ์‹œ

ํ‚ค๊ธฐ ์œ„ํ•ด์„œ๋Š”, ์ •๊ฐ์ด 6.2o์ด์–ด์•ผ ํ•จ์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค.

๊ฒฐ๊ณผ ๋ฐ ๊ณ ์ฐฐ

์ƒˆ๋กญ๊ฒŒ ์„ค์ •๋œ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ์ ์šฉํ•œ 2๊ฐœ์˜ LD ๋”๋ฏธ

์˜ ์ถœ๋ ฅ์„ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์œผ๋กœ ๊ฒฐํ•ฉํ•˜๋Š” ์—ด์ฒ˜๋ฆฌ์šฉ ๋ผ์ธ

๋น” ๊ด‘ํ•™๊ณ„์˜ ๊ฒฐ์ƒ๋ฉด์—์„œ์˜ ์ง‘์† ์ •๋„๋Š” LightTools๋ฅผ ์‚ฌ์šฉ

ํ•˜์—ฌ ์‹œ๋ฎฌ๋ ˆ์ด์…˜ํ•จ์œผ๋กœ์จ ํŒŒ์•…๋  ์ˆ˜ ์žˆ๋Š”๋ฐ, ๊ทธ ๊ฒฐ๊ณผ๋ฅผ ์„ค

๋ช…ํ•ด๋ณด์ž.

Fig. 10์˜ ๊ด‘์„ ์ถ”์ ๋„๋Š” Table 2์˜ ๋ฐ์ดํ„ฐ๋ฅผ LightTools

์— ์ž…๋ ฅํ•˜์—ฌ ๋‚˜ํƒ€๋‚ธ ๊ฒƒ์ธ๋ฐ, ์—ฌ๊ธฐ์—์„œ๋Š” ๋ ˆ์ด์ € ๋น”์˜ ์ง‘์†

์ •๋„๋ฅผ ํŒŒ์•…ํ•  ์ˆ˜ ์žˆ๋Š” ์œ„์น˜๋ฅผ ๋‚˜ํƒ€๋‚ด๋Š” ํ‘œ์‹œ์ž์ธ ๋ฆฌ์‹œ๋ฒ„

(receiver)๋ฅผ ์„ค์ •ํ•  ์ˆ˜ ์žˆ๋‹ค. ๋ฆฌ์‹œ๋ฒ„์˜ ์œ„์น˜๊ฐ€ ์„ค์ •๋˜๋ฉด ๊ทธ

์œ„์น˜์—์„œ์˜ ์ง‘์† ์ •๋„๋ฅผ ๋ฐฉ์‚ฌ์กฐ๋„๋กœ ๊ณ„์‚ฐํ•˜์—ฌ ๊ทธ๋ž˜ํ”ฝ์œผ๋กœ

ํ‘œํ˜„ํ•  ์ˆ˜ ์žˆ๊ฒŒ ๋œ๋‹ค. Fig. 10์—์„œ ๋ณด๋ฉด ๋ฆฌ์‹œ๋ฒ„๊ฐ€ receiver_

59(๊ด‘ํ•™๊ณ„ ๋ณดํ˜ธ์ฐฝ), receiver_67(์ž‘์—…๊ฑฐ๋ฆฌ โˆ’ 10 mm ์œ„์น˜),

receiver_72(์ž‘์—…๊ฑฐ๋ฆฌ ์œ„์น˜), receiver_77(์ž‘์—…๊ฑฐ๋ฆฌ + 10 mm

์œ„์น˜) 4๊ตฐ๋ฐ ์„ค์ •๋˜์–ด ์žˆ๋Š”๋ฐ, ๊ฐ๊ฐ์˜ ์œ„์น˜์—์„œ ์‹œ๋ฎฌ๋ ˆ์ด

์…˜ ๋œ ๋ฐฉ์‚ฌ์กฐ๋„๋ฅผ Fig. 11~14์—์„œ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค.

Fig. 11์€ ๋ผ์ธ ๋น” ํ˜•์„ฑ ๊ด‘ํ•™๊ณ„์˜ ๋ณดํ˜ธ์ฐฝ์—์„œ์˜ ๋ ˆ์ด์ €

๋น” ์ง‘์† ์ƒํƒœ๋ฅผ ๋ณด์—ฌ์ฃผ๋Š”๋ฐ, 1๊ฐœ์˜ LD ๋”๋ฏธ์˜ ๋ฐœ๊ด‘์˜์—ญ์ด

10 mmร—40 mm์ด๊ณ  ๋‘ LD ๋”๋ฏธ ๋ฐœ๊ด‘์˜์—ญ์˜ ๊ฐ„๊ทน์ด 3.5 mm

๋กœ ์กด์žฌํ•˜๋˜ ์ดˆ๊ธฐ์˜ ์ƒํƒœ์˜ ๋ฐœ๊ด‘์˜์—ญ์ด ๋ณดํ˜ธ์ฐฝ ์œ„์น˜์—์„œ

๋Š” 6 mmร—20 mm์˜ ํฌ๊ธฐ์˜ ๋‘ ๋ฐœ๊ด‘์˜์—ญ์ด ๊ฐ„๊ทน 15 mm๋กœ

์ง„ํ–‰๋˜์—ˆ์Œ์„ ๋ณด์—ฌ์ค€๋‹ค.

Fig. 12~14๋Š” ๊ฐ๊ฐ ๋ ˆ์ด์ € ๋น” ์ง‘์†๊ด‘ํ•™๊ณ„์˜ ์ž‘์—…๊ฑฐ๋ฆฌ

280 mm - 10 mm, 280 mm, 280 mm + 10 mm ์œ„์น˜์—์„œ์˜

Fig. 10(a)์˜ LD ๋”๋ฏธI, II์˜ ๋ ˆ์ด์ € ๋น”์— ์˜ํ•œ ๋ผ์ธ ๋น”์˜

์ค‘์ฒฉ ์ •๋„๋ฅผ ๋ณด์—ฌ์ฃผ๋Š”๋ฐ, Fig. 8(a)์—์„œ ๋ณด์ด๋˜ ๋ถ„๋ฆฌ๋œ ๋‘

๋ฐœ๊ด‘์˜์—ญ์ด ๊ฑฐ์˜ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น” ํ˜•ํƒœ๋กœ ๊ฒฐํ•ฉ๋œ ๋ชจ์Šต์„

๋ณด์—ฌ์ฃผ๊ณ  ์žˆ๋‹ค.

Fig. 11. Irradiance chart on the receiver_59 of the optimized

line-focusing optical system with a reverse-biprism.

Fig. 12. Irradiance chart on the receiver_67 of the optimized

line-focusing optical system with a reverse-biprism.

Line-Focusing Optical System of Laser Beam with Reverse-Biprism 71

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

Table 3์—๋Š” Fig. 12~14์˜ ๋ฐฉ์‚ฌ์กฐ๋„ ์ฐจํŠธ์˜ x์ถ• ๋ฐฉํ–ฅ์˜

์ˆ˜์น˜ ๋ฐ์ดํ„ฐ๋ฅผ ๋ถ„์„ํ•˜์—ฌ, ๊ฐ๊ฐ์˜ ๋ฆฌ์‹œ๋ฒ„์—์„œ์˜ ํ‰๊ท ๊ฐ’, ์ตœ

๋Œ€๊ฐ’, ์ตœ์†Œ๊ฐ’, ํ‰๊ท ๊ฐ’์—์„œ์˜ ํŽธ์ฐจ ๋“ฑ์„ ์ •๋ฆฌํ•˜์—ฌ ๋†“์€ ์ž

๋ฃŒ์ด๋‹ค. ์—ฌ๊ธฐ์—์„œ ๋ณด๋ฉด ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm - 10 mm ์œ„์น˜์—

์„œ๋Š” ์—ฐ๊ฒฐ๋œ ๋ผ์ธ ๋น”์˜ ๋ฐฉ์‚ฌ์กฐ๋„ ๊ท ์ผ๋„ ๋ฒ”์œ„๊ฐ€ ํ‰๊ท ๊ฐ’์—

์„œ +21% ~ โˆ’7%์— ์ด๋ฅด๊ณ  ์žˆ์Œ์„ ์•Œ ์ˆ˜ ์žˆ๊ณ , ์ž‘์—…๊ฑฐ๋ฆฌ

280 mm ์œ„์น˜์—์„œ์˜ ์—ฐ๊ฒฐ๋œ ๋ผ์ธ ๋น”์˜ ๋ฐฉ์‚ฌ์กฐ๋„ ๊ท ์ผ๋„

๋ฒ”์œ„๊ฐ€ ํ‰๊ท ๊ฐ’์—์„œ +10% ~ โˆ’9%์— ๋„๋‹ฌํ•˜๊ณ  ์žˆ์Œ์„ ์•Œ ์ˆ˜

์žˆ์œผ๋ฉฐ, ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm + 10 mm ์œ„์น˜์—์„œ์˜ ์—ฐ๊ฒฐ๋œ ๋ผ

์ธ ๋น”์˜ ๋ฐฉ์‚ฌ์กฐ๋„ ๊ท ์ผ๋„ ๋ฒ”์œ„๊ฐ€ +17% ~ โˆ’25%์ด๋‚ด์— ๋„

๋‹ฌํ•˜๊ณ  ์žˆ์Œ์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค.

๋˜ํ•œ Fig. 12~14์—์„œ ๊ฐœ๋ฐœ๋œ ๋ ˆ์ด์ € ๋น” ์ง‘์†๊ด‘ํ•™๊ณ„์˜ ์ง‘

์† ๋ผ์ธ ์„ ํญ์ด ์žฅ์ถ•๋ฐฉํ–ฅ์œผ๋กœ 40 mm(ยฑ10%) ๊ธธ์ด๋ฅผ ๊ฐ€์ง

์„ ํ™•์ธํ•  ์ˆ˜ ์žˆ๋‹ค. ์ด๋Š” ๊ฐœ๋ฐœ์˜๋ขฐ์ž์˜ ์„ค๊ณ„ ๊ธฐ์ค€(Table 1

์˜ ์กฐ๊ฑด)์„ ๋ชจ๋‘ ์ถฉ์กฑํ•˜๊ณ  ์žˆ์Œ์„ ๋ณด์—ฌ์ค€๋‹ค.

๊ฒฐ ๋ก 

๋ณธ ์—ฐ๊ตฌ์—์„œ๋Š” ์•ˆ๊ด‘ํ•™๊ธฐ๊ธฐ์—์„œ ์ฃผ๋กœ ์‚ฌ์šฉ๋˜์–ด ์™”๋˜ ๋ฐ”

์ดํ”„๋ฆฌ์ฆ˜์—์„œ ์ฐฉ์•ˆ๋œ ์ƒˆ๋กœ์šด ํ˜•ํƒœ์˜ ํ”„๋ฆฌ์ฆ˜์ธ ์—ญ๋ฐ”์ดํ”„๋ฆฌ

์ฆ˜์„ ์„ค์ •ํ•˜์—ฌ ๋ณด์•˜๊ณ , ์ด ์ƒˆ๋กญ๊ฒŒ ์„ค์ •๋œ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„

๋ ˆ์ด์ € ๋น”์„ ์ด์šฉํ•œ ์—ด์ฒ˜๋ฆฌ ์žฅ๋น„์— ์‚ฌ์šฉ๋  2๊ฐœ์˜ LD ๋”

๋ฏธ์˜ ๋ ˆ์ด์ € ๋น”์„ ์ง‘์†ํ•˜์—ฌ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์„ ํ˜•์„ฑํ•  ์ˆ˜

์žˆ๋Š” ๋ ˆ์ด์ € ๋น” ์ง‘์†๊ด‘ํ•™๊ณ„์˜ ์„ค๊ณ„์— ์ ์šฉํ•ด๋ณด์•˜๋‹ค.

๊ทธ ๊ฒฐ๊ณผ ์ƒˆ๋กญ๊ฒŒ ์ œ์•ˆ๋œ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ์‚ฌ์šฉํ•จ์œผ๋กœ์จ

10 mm ร— 40 mm์˜ ๋ฐœ๊ด‘ ์˜์—ญ์„ ๊ฐ€์ง€๋ฉด์„œ 3.5 mm ์ด๊ฒฉ๋œ

๋‘ LD ๋”๋ฏธ์˜ ๋ฐœ๊ด‘์˜์—ญ์„ ๊ฒฐํ•ฉํ•˜์—ฌ 20 mm ร— 1 mm์˜ ๋ผ์ธ

๋น” ํ˜•ํƒœ๋กœ ์ง‘์†ํ•  ์ˆ˜ ์žˆ๋Š” ๋ ˆ์ด์ € ๋น” ์ง‘์†๊ด‘ํ•™๊ณ„๋ฅผ ๊ฐœ๋ฐœํ• 

์ˆ˜ ์žˆ์—ˆ๋‹ค. ๊ฐœ๋ฐœ๋œ ๋ ˆ์ด์ € ๋น” ์ง‘์†๊ด‘ํ•™๊ณ„๋Š” ์ง‘์† ๋ผ์ธ ์„ ํญ

์„ 1 mm ร— 40 mm(ยฑ10%)๋กœ ๊ฐ€์ง€๋ฉด์„œ ๋ผ์ธ ๋น”์˜ ๋ฐฉ์‚ฌ์กฐ๋„

๊ท ์ผ๋„ ๋ฒ”์œ„๊ฐ€ ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm์—์„œ๋Š” ยฑ10% ์ด๋‚ด, ์ž‘์—…๊ฑฐ

๋ฆฌ 280 mm ยฑ 10 mm์—์„œ๋Š” ยฑ25% ์ด๋‚ด์ธ ๊ด‘ํ•™๊ณ„๊ฐ€ ๋˜์—ˆ๋‹ค.

๋ณธ ๋…ผ๋ฌธ์—์„œ๋Š” ์•ˆ๊ฒฝํ…Œ ๋ถ„์•ผ์˜ ์†Œ์žฌ๋กœ ์ค‘์š”ํ•œ ํ‹ฐํƒ„์˜ ์—ด

์ฒ˜๋ฆฌ ๊ด‘ํ•™๊ณ„ ๊ฐœ๋ฐœ์— ์ƒˆ๋กœ์šด ํ˜•ํƒœ์˜ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ์„ค์ •

ํ•˜์—ฌ ์ ์šฉํ•˜์—ฌ ๋ณด์•˜๋‹ค. ์•ž์œผ๋กœ ์•ˆ๊ด‘ํ•™ ์žฅ๋น„ ๊ฐœ๋ฐœ์— ์žˆ์–ด์„œ

์ด๊ฒฉ๋œ ๋‘ ๊ด‘์›์„ ๊ฒฐํ•ฉํ•˜๊ฑฐ๋‚˜, ๋‘ ๊ด‘์›์„ ๊ฒฐํ•ฉํ•˜์—ฌ ๋น„๊ต

๋ถ„์„ํ•˜๋Š” ๋ถ„์•ผ์— ์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์—ญํ• ์ด ๊ณ„์† ์žˆ์„ ๊ฒƒ

์œผ๋กœ ํŒ๋‹จ๋œ๋‹ค.

Table 3. Summary table of the maximum, minimum, and

average values of the irradiance numerical data

in the vertical axis of the irradiance charts shown

in Figs. 12โ€“14 (units: 0.5ร—10โˆ’5W/mm2)

Receiver # Average (a)Maximum Minimum

b (b-a)/a c (c-a)/a

67 4.10 4.95 0.21 3.81 โˆ’0.07

72 4.10 4.49 0.10 3.72 โˆ’0.09

77 4.10 4.80 0.17 3.06 โˆ’0.25

Fig. 13. Irradiance chart on the receiver_72 of the

optimized line-focusing optical system with a

reverse-biprism.

Fig. 14. Irradiance chart on the receiver_77 of the optimized

line-focusing optical system with a reverse-biprism.

72 Dong-Hee Lee

Vol. 26, No. 1, March 2021 J Korean Ophthalmic Opt Soc.

๊ฐ์‚ฌ์˜ ๊ธ€

๋ณธ ์—ฐ๊ตฌ๋Š” 2020๋…„๋„ ๊ทน๋™๋Œ€ํ•™๊ต ๊ต๋‚ด์—ฐ๊ตฌ๋น„(๊ณผ์ œ๋ฒˆํ˜ธ

:FEU2020R19) ์ง€์›์— ์˜ํ•ด ์ˆ˜ํ–‰๋˜์—ˆ์Šต๋‹ˆ๋‹ค.

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[5] Cha JW, Lee DH. Developement of scope for military

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2015.20.2.167

[6] Synopsys. Code V Optical Design Software, 2019. https://

www.synopsys.com/optical-solutions/codev.html(27 May

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[7] Synopsys. LightTools Illumination Design Software,

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[8] Coherent. DILAS, 2020. http://www.dilas.com/products/

search(25 November 2020).

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[10] Jenkins FA, White HE. Fundamentals of optics, 4th Ed.

New York: McGRAW-HILL, 2001;64-65.

[11] Edmund Optics. UV vs. IR Grade Fused Silica, 2020.

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cation-notes/optics/uv-vs.-ir-grade-fused-silica/(1 January

2021).

์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ๊ฐ€์ง€๋Š” ๋ ˆ์ด์ € ๋น” ๋ผ์ธ ์ง‘์† ๊ด‘ํ•™๊ณ„

์ด๋™ํฌ*

๊ทน๋™๋Œ€ํ•™๊ต ์•ˆ๊ฒฝ๊ด‘ํ•™๊ณผ, ๊ต์ˆ˜, ์Œ์„ฑ 27601

ํˆฌ๊ณ ์ผ(2021๋…„ 3์›” 9์ผ), ์ˆ˜์ •์ผ(2021๋…„ 3์›” 18์ผ), ๊ฒŒ์žฌํ™•์ •์ผ(2021๋…„ 3์›” 19์ผ)

๋ชฉ์ : ๋‘ LD ๋”๋ฏธ์˜ ๋ฐœ๊ด‘์˜์—ญ ๋น”์„ ๊ฒฐํ•ฉํ•˜์—ฌ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์„ ๋ฐœ์ƒ์‹œํ‚ค๋Š” ๋ผ์ธ ์ง‘์† ๊ด‘ํ•™๊ณ„๋ฅผ ๊ฐœ๋ฐœํ•˜๊ณ ์ž ํ•œ๋‹ค.

๋ฐฉ๋ฒ•: ์•ˆ๊ด‘ํ•™๊ธฐ๊ธฐ์— ์‚ฌ์šฉ๋˜์–ด ์™”๋˜ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ๊ตฌ์„ฑ์„ ๊ฑฐ๊พธ๋กœ ํ•จ์œผ๋กœ์จ ์ƒˆ๋กœ์šด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„ ์ •์˜ํ•  ์ˆ˜ ์žˆ์—ˆ๊ณ , ์ด

๊ฒƒ์œผ๋กœ ๋‘ LD ๋”๋ฏธ์˜ ๋ฐœ๊ด‘์˜์—ญ ๋น”์„ ๊ฒฐํ•ฉํ•˜๋Š” ๊ด‘ํ•™๊ณ„๋ฅผ ๊ฐœ๋ฐœํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ๊ฒฐํ•ฉ๋œ ๋ฐœ๊ด‘์˜์—ญ์˜ ๋น”์„ ๋ผ์ธ ๋น” ํ˜•ํƒœ

๋กœ ๋ณ€ํ™˜๋˜๋„๋ก ํ•˜๊ธฐ ์œ„ํ•ด ์‹ค๋ฆฐ๋”๋ Œ์ฆˆ๋ฅผ ๋„์ž…ํ•˜์˜€๊ณ , ์ด ๋ผ์ธ ๋น”์˜ ๋ฐœ๊ด‘์กฐ๋„์˜ ๊ท ์ผ๋„๋ฅผ ์œ„ํ•ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์ •๊ฐ

์„ ์ตœ์ ํ™” ๋ณ€์ˆ˜๋กœ ์‚ฌ์šฉํ•˜์˜€๋‹ค. ๊ฒฐ๊ณผ: ์ƒˆ๋กญ๊ฒŒ ์„ค๊ณ„๋œ ๋ผ์ธ ์ง‘์† ๊ด‘ํ•™๊ณ„๋Š” ๋‘ LD ๋”๋ฏธ์˜ ๋ฐœ๊ด‘์˜์—ญ์˜ ๋น”์„ ๊ฒฐํ•ฉํ•˜์—ฌ

ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์„ ํ˜•์„ฑํ•  ์ˆ˜ ์žˆ๋Š” ๊ด‘ํ•™๊ณ„๊ฐ€ ๋˜์—ˆ๋Š”๋ฐ, ์ง‘์† ๋ผ์ธ ๋น” ํ˜•์ƒ์˜ ํฌ๊ธฐ๊ฐ€ 1 mm ร— 40 mm(ยฑ10%)์ด๋ฉด์„œ ๋ผ

์ธ ๋น”์˜ ๋ฐฉ์‚ฌ์กฐ๋„ ๊ท ์ผ๋„ ๋ฒ”์œ„๊ฐ€ ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm์—์„œ๋Š” ยฑ10% ์ด๋‚ด, ์ž‘์—…๊ฑฐ๋ฆฌ 280 mm ยฑ 10 mm์—์„œ๋Š” ยฑ25% ์ด

๋‚ด์ธ ํŠน์„ฑ์„ ๊ฐ–๋Š” ๊ด‘ํ•™๊ณ„๊ฐ€ ๋˜์—ˆ๋‹ค. ๊ฒฐ๋ก : ๊ธฐ์กด์˜ ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ๊ธฐ์ € ๋ฐฉํ–ฅ์„ ๋ฐ˜๋Œ€๋กœ ํ•˜์—ฌ ์žฌ์ •์˜๋œ ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์„

์‘์šฉํ•จ์œผ๋กœ์จ ๋‘ LD ๋”๋ฏธ์˜ ๋ฐœ๊ด‘์˜์—ญ์˜ ๋น”์„ ๊ฒฐํ•ฉํ•˜์—ฌ ํ•˜๋‚˜์˜ ๋ผ์ธ ๋น”์„ ๋ฐœ์ƒ์‹œํ‚ฌ ์ˆ˜ ์žˆ๋Š” ๋ผ์ธ ๋น” ์ง‘์† ๊ด‘ํ•™๊ณ„๋ฅผ

์„ค๊ณ„ํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. ์•ž์œผ๋กœ ์ด๊ฒฉ๋œ ๋‘ ๊ด‘์›์„ ๊ฒฐํ•ฉํ•˜๋Š” ๋ถ„์•ผ์— ์ด ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜์˜ ์—ญํ• ์ด ๊ณ„์† ์žˆ์„ ๊ฒƒ์œผ๋กœ ๊ธฐ๋Œ€๋œ๋‹ค.

์ฃผ์ œ์–ด: ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜, ์—ญ๋ฐ”์ดํ”„๋ฆฌ์ฆ˜, LD ๋”๋ฏธ, ๋ฐœ๊ด‘์˜์—ญ, ๋ผ์ธ ์ง‘์† ๊ด‘ํ•™๊ณ„


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