IMAXIMAX(LARGER THAN LIFE)LARGER THAN LIFE)

BY

PRIYA ADHAV (I.T.)PRIYA ADHAV (I.T.)

GUIDE

MRS.PRACHI DHANAWATMRS.PRACHI DHANAWAT

INTRODUCTION TO IMAXINTRODUCTION TO IMAX What is “IMAX” ?

Def -“IMAX integrated technology.”

Def-”IMAX integrated technology.”1. Film format 2. Screens3. Projector4. Digital sound system5. Theatre design6. 3D camera

FILM FORMATFILM FORMAT

PERFORATIONS->TINY HOLES ON THE FILM

Academy film Academy film formatformat

4/35film 4perf->height

35mm->width Perf are on both

sides Moves vertically Sound track is

added

IMAX filmIMAX film

formatformat

15/70 15perf->width

70mm->height Perf are on the top

& bottom Moves horizontally No sound track is

added

SCREENSSCREENS Screen size : IMAX screen->50 feet tall & 70 feet wide

IMAX flat screen->100 feet high

IMAX DOME screen->90 feet in diam small plates of Al with

20%area perforated with holes

IMAX PROJECTORIMAX PROJECTOR

Most advanced precise & powerful History IMAX projector ->24 frames/sec at rate of

334 feet/min Normal projector->24 frames/sec at rate of

90 feet/min Rolling loop, shutter mechanism & cam

controlled arm

Frame of the film is rolled onto registration pins over optical glass called “field flattenerfield flattener.”

Shutter mechanismShutter mechanism ->transmits 1/3rd more light, source is brighter, opened for 20% longer

Rolling loop-Rolling loop-:compressed-air “puffer” cylindrical lens

Height of lens , Pneumatic piston

Cam controlled armsCam controlled arms-->eliminate microscopic shaking

Fig:15 kw xenon short-arc lamp

Rolling Loop TechnologyRolling Loop Technology

Rolling loop projector system

Air valve Vacuum on the lens

Rotor

Input sprocket

Registration pins

Cam unit

Output sprocket

Rotary air valve

Fig: IMAX PROJECTORIMAX PROJECTOR

Fig: Input sprocketInput sprocket Fig: Cam unit & Cam unit & registration pinsregistration pins

Dome IMAX TheatreDome IMAX Theatre

OMNIMAX:OMNIMAX: 180 degrees

horizontally

100 degrees above the horizon

22 degrees below the horizon

Fig: Frame layout of IMAX Dome film

Features of OMNIMAXFeatures of OMNIMAX

Special fisheye lenses

Lens optically centered 9.4mm above film horizontal center line projected elliptically on a dome screen

IMAX Dome ProjectorIMAX Dome Projector

For tilted planetarium Surface area->1000 sqm Uses->800 sqm Screen

IMAX 3-D ProjectorIMAX 3-D Projector

Projects 2 separate images 3-d polarized glasses

IMAX SOUND SYSTEMIMAX SOUND SYSTEM High sound quality Sound reproducer->”Dubber” Interlock circuit 6 channel DTAC (‘Digital Theatre Audio Control’) New sound system->KANGA Dolby Digital & DTS DDP is replaced by DTAC

Fig 1.8: The layout of the new ,Dolby Digital sound system Fig 1.8: The layout of the new ,Dolby Digital sound system

Fig 1.9:A typical layout for theatrical “5.1” digital sound.The exact Fig 1.9:A typical layout for theatrical “5.1” digital sound.The exact placement & number of speakers may varyplacement & number of speakers may vary

3-D Camera3-D Camera Incorporation of 2 camera movement

Uses either 3d glasses or liquid-crystal shutter glasses

2 camera lenses->left eye & right eye

2 lenses separated by intraocular distance of 64 mm

3D illusion3D illusion

PolarizationPolarization E3DE3D

Images polarized perpendicularly

2 images simultaneously

Polarization effect

Alternate images

1 image momentarily

Transparent & opaque efffect

IMAX

IMAX

PROJECTOR

#1 LEFT POLARIZER

#2 RIGHT POLARIZER

#3 SCREEN

#4 POLARIZED LIGHT FROM PROJECTORS BOUNCES BACK

#5 CROSS POLARIZING GLASSES

L R

THANK YOUTHANK YOU