Composed of a plane and a concave spherical surface, it has a negative focal length and negative spherical deviation, which can diverge the collimated incident light and form only a virtual image seen through the lens. Often used to expand beams, increase system length, and counteract aberrations of other lenses in the system. Widely used in display system projection system, laser measurement, optical imaging, beam control and other fields.
| Material |
CDGM
optical glass, CORNING, SCHOTT, HOYA, OHARA, and other specified materials |
|
Outer
diameter
|
φ4-φ80mm
|
|
Surface
Figure
|
≤1（0.5）
|
|
Machining
Tolerance
|
≤1(0.5)
|
|
Eccentricity
|
1 arc minute
|
|
Surface
Quality
|
40/20
|
Hotline
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