Double concave spherical lens is composed of two concave spherical surfaces, the focal length is negative, and it is usually used for narrowing imaging and diverging beams, etc. Widely used in display systems, projection systems, 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
|
Center
thickness tolerance: ±0.05mm, outer diameter tolerance: ±0.05mm, sagittal
height tolerance: ±0.05mm
|
|
Eccentricity
|
1 arc minute
|
|
Surface
Quality
|
40/20
|
| Material |
CDGM
optical glass, CORNING, SCHOTT, HOYA, OHARA, and other specified materials |
|
Outer
diameter
|
φ4-φ80mm
|
|
Surface
Figure
|
≤1（0.5）
|
|
Machining
Tolerance
|
Center
thickness tolerance: ±0.05mm, outer diameter tolerance: ±0.05mm, sagittal
height tolerance: ±0.05mm
|
|
Eccentricity
|
1 arc minute
|
|
Surface
Quality
|
40/20
|
