On the mark

Fabrication

Precision Fabrication

Coating

• R avg. < 5% @ 2.5-13µm. 0deg

• Adhesion per MIL-C-48497

• Abrasion per MIL-C-48497

• R avg. < 0.5% @ 3-5µm. 0deg

• Adhesion per MIL-C-48497

• Abrasion per MIL-C-48497

• R avg. < 0.5% @ 8-12µm. 0deg

• Adhesion per MIL-C-48497

• Abrasion per MIL-C-48497

Coating (Non-Radioactive)

Coating Specification

S1: Broad AR R avg. < 0.5% @ 3.75-5.13um, 0 deg

S2: Broad AR R avg. < 0.5% @ 3.75-5.13um, 0 deg

Total Transmission : > 98% @ 3.75-5.13um, 0deg

Transmission vs. Wavelength

60

65

70

75

80

85

90

95

100

3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3

Wavelength (um)

Tra

ns

mis

sio

n (

%)

Actual Result: Lot # C11-1243 & C11-1245

C11-1243 : R avg. = 0.38% @ 3.75-5.13um, 0 deg

C11-1245: R avg. = 0.48% @ 3.75-5.13um, 0 deg

Total Transmission = 98.36% @ 3.75-5.13um, 0deg

Material: Ge

Diameter: 0.87”

Coating with Non-radioactive material (ThF4 )

• Moderate abrasion

• Adhesion Test

• Environmental Tests

• Temperature Cycle Test

• Humidity Test

Reflection vs. Wavelength (C11-1243)

-0.5

0.5

1.5

2.5

3.5

4.5

5.5

3.3 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.9 5.1 5.3

Wavelength (um)

Re

fle

cti

on

(%

)

QC / Abrasion & Adhesion Tests

• MIL-C-48497

• Moderate Abrasion: 50 Strokes across the coated surface with a ¼” thickness pad of clean, dry cheesecloth. Minimum 1 pound of force must be applied.

• Severe Abrasion: 20 strokes across the surface with standard eraser conforming to MIL-E-12397. 2-2.5 pound of force must be applied

• Adhesion Test: 0.5” wide SCOTCH tape is pressed firmly on to the coated surface and then quickly removed at a normal angle.

Military Specification Lens Coating Hardness Kit

QC / Salt Fog Spray Test

The salt fog method is applied to determine the effects of salt deposits on the physical & electrical aspects of the coatings.

• MIL-STD-810F (method 509.4)

• Salt Solution: 5+/-1% concentration. Confirmed by checking the specific gravity of the solution.

• Temperature: 35degC +/-2deg

• Duration: 48 hours of exposure + 48 hours of drying time

• 4 periods of 24hour periods (2 wet + 2 dry)

•The component should exhibit no signs of corrosion.

Associated Environmental Systems - Model# MX9200

QC / Humidity Test

Humidity test is performed to determine the resistance of the coatings and assemblies to degradation from exposure to high relative humidity.

• MIL-C-48497 : “Basic” resistance to humidity

• Temperature : 120deg F

• Humidity: 95-100% relative for 24~48hrs.

• The component shall not exhibit any signs of flaking, peeling, cracking, blistering, coating separation, moisture penetration or softening of cement if assembled.

Blue M Electric - Model # AC-7502-TDA-4

QC / Temperature Cycle Test

Temperature exposure testing is performed to determine the resiliency of the coatings and assemblies to changes in temperature.

• MIL-C-48497

• Temperature: -80deg +/-2deg F & +160deg+/-2deg F

• Time: 2 hours at each temperature

• Rate of Temp Change: < 4 deg F per minute

• The component shall not exhibit any signs of flaking, peeling, cracking, blistering, coating separation, or softening of cement if assembled.

Tenney Engineering – Model # TJR

Lambda Research Optics, Inc.

1695 W. MacArthur Blvd.

Costa Mesa, CA 92626 (USA)

Tel: 714-327-0600

Fax; 714-327-0610

Email: lambda@lambda.cc

For more information, go to

http:// www.lambda.cc