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Flat concave mirror
Used with the concave（平凹镜） side facing the longer conjugate, these lenses act as a beam-expanding element in large f-number systems.
Product details
Used with the concave（平凹镜） side facing the longer conjugate, these lenses act as a beam-expanding element in large f-number systems.
产品指标如下：
Diameter tolerance +0,-0.005” (+0,-0.13 mm)
Center Thickness tolerance ±0.008” (±0.2 mm)
Design Wavelength 5 microns
Focal Length Tolerance ±2%
Surface Quality 60/40
Clear Aperture 90% Central Diameter
Wedge Angle < 3 arc min
Surface Irregularity 1/2 l at 633 nm
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