On the mark
Precision Fabrication
Fabrication
• R avg. < 5% @ 2.5-13µm. 0deg
• Adhesion per MIL-C-48497
• Abrasion per MIL-C-48497
• R avg. < 0.5% @ 8-12µm. 0deg
• R avg. < 0.5% @ 3-5µm. 0deg
• Adhesion per MIL-C-48497
• Adhesion per MIL-C-48497
• Abrasion per MIL-C-48497
• Abrasion per MIL-C-48497
Coating
Transmission vs. Wavelength
Reflection vs. Wavelength (C11-1243)
Material: Ge
100
5.5
Diameter: 0.87”
95
Coating with Non-radioactive material (ThF4 )
Transmission
(%)
Reflection
(%)
4.5
90
85
3.5
• Moderate abrasion
80
• Adhesion Test
2.5
• Environmental Tests
75
• Temperature Cycle Test
70
1.5
• Humidity Test
65
0.5
60
3.3
3.3
3.5
3.5
3.7
3.7
-0.5
3.9
3.9
4.1
4.1
4.3
4.3
4.5
4.5
4.7
4.7
4.9
4.9
5.1
5.1
5.3
5.3
Wavelength (um)
Wavelength (um)
Coating Specification
Actual Result: Lot # C11-1243 & C11-1245
S1: Broad AR R avg. < 0.5% @ 3.75-5.13um, 0 deg
C11-1243 : R avg. = 0.38% @ 3.75-5.13um, 0 deg
S2: Broad AR R avg. < 0.5% @ 3.75-5.13um, 0 deg
C11-1245: R avg. = 0.48% @ 3.75-5.13um, 0 deg
Total Transmission : > 98% @ 3.75-5.13um, 0deg
Total Transmission = 98.36% @ 3.75-5.13um, 0deg
Coating (Non-Radioactive)
• 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 / Abrasion & Adhesion Tests
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 / Salt Fog Spray 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 / Humidity 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
QC / Temperature Cycle Test
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