Standard Lens

The standard lens is a lens composed of standard OpticStudio surfaces. Standard surfaces may be planes, spheres, conic aspheres, or hyperhemispheres. The standard lens is composed of 5 separate sections:

1. A standard shape front face.
2. A standard shape rear face.
3. An annular ring between the clear aperture of the front face and the edge of the front face.
4. An annular ring between the clear aperture of the rear face and the edge of the rear face.
5. A possibly tapered cylindrical surface connecting the edges of the front and rear faces of the lens.

All 5 surfaces may refract, reflect, or absorb light, depending upon the material properties.

9 parameters are used to define a standard lens:

Parameter #	Description	Face Name	Face #
1	The radius of curvature of the front face. Use zero for infinity (flat).	Front	1
2	The conic constant of the front face.	Front	1
3	The clear semi-diameter to the clear aperture of the front face. Use a negative value to yield the hyperhemispheric sag point.	Front	1
4	The radial aperture to the edge of the front side of the lens.	Front	1
5	The center-to-center thickness of the lens.	Side	0
6	The radius of curvature of the rear face. Use zero for infinity (flat).	Back	2
7	The conic constant of the rear face.	Back	2
8	The clear semi-diameter to the clear aperture of the rear face. Use a negative value to yield the hyperhemispheric sag point.	Back	2
9	The radial aperture to the edge of the rear side of the lens.	Back	2

The reference point is the center of the front face of the lens. Face Numbers: Front face Face 1, back face Face 2, all other faces Face 0.

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• Standard Surface