Material: optical glass K9, quartz, fused silica, BK7， sapphire
Size: φ 5mm~260mm
Dimensional tolerance: -0.02~0.1mm
Center thickness tolerance: -0.02~0.1mm
Curvature radius tolerance:<0.001mm
Surface finish: 10/5~60/40
Surface type: λ/8 to λ/2
Aperture:>90%
Inverted edge: ＜ 0.3mm * 45 °
Coating: Coating with anti reflective film
If you have different requirements, please consult customer service.
A plano concave lens diverges parallel light outward, with a negative focal length and spherical aberration. It can be used to correct phase difference, spherical aberration, coma, and distortion of other lenses. Similar to a flat concave mirror, the side is generally facing away from the object surface or infinity.
A plano concave lens is a type of concave lens composed of a plane and a concave surface, which has the function of diverging light rays.
One side flat, one side concave: One surface of a plano concave lens is flat (with an infinite curvature radius), and the other surface is concave (with a negative or positive curvature radius, depending on the sign rule).
Laser beam expansion: Expanding the light spot by diverging the beam.
Correcting myopia: utilizing the divergent characteristics of concave lenses to shorten the image distance.
Optical system calibration: Adjust the beam divergence angle in the optical path.