1. Product Details

 1. Material: B- 270 super white glass. Index: Nd = 1.5230%%p0.001, Vd = 58.5%%p0.6
 2. The environmental test of the film surface shall refer to the standards of 4.5.3 and 4.5.4 in the specified MIL-C-48497A.
 3. Transmittance requirements of light incident points in reticle non-chromium areas: greater than or equal to (410 nm, 99.00%),(450 nm, 99.00%), (500 nm, 98.70%),(550 m, 98.9%),(600 nm, 98.9%),(650 nm, 98.5%),700 nm, 97.5%).
 4. It is required to use 400# diamond abrasive tools for Chamfering.
 5. Scribing shall conform to the provisions of section 3.7.11.4 of US military standard MIL-PRF-1383B, and no more than one fracture or line gap exceeding 10um (no more than 1 line break or no more than 10um per line) is allowed. The width and height of all lines must be the same. The intersection of Cross-wire must be clear and sharp. The smooth or suddenly changing line wide brim with a line width less than 50um shall not exceed 10%. The line shall be evenly divided under any circumstances, the sudden change width does not exceed 10um, and the rounded corners of the Cross do not exceed 1/4 of the line width.
 6. The Scribing mark (55277) is 0.15%%p0.1 width and 0.1%%p0.05.
 7. The minimum optical density of black chromium is 3.0, and the maximum average reflectivity is 8%.
 8. Surface quality: 10-2
 9. Center thickness: 2.0%%p0.1
 10. Diameter: 20.575~20.600; Parallelism: 0.018mm
 11. Aperture: 10 copies; As: 5 copies

2. The product details picture is as follows






ISO9001 certification