Image-forming lens

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G02B 300

Patent

active

049647032

ABSTRACT:
An image-forming lens having a primary surface defined by a spherical surface and located on the side of an object when the lens is used to provide negative magnification, a secondary surface defined by a flat plane and located on the side of an image, the lens having therein a refractive index distribution exhibiting a substantially spherical symmetry with its center located in the vicinity of the highest point of the primary surface located most distantly from the secondary surface when measured perpendicularly from the secondary surface.

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patent: 4721369 (1988-01-01), Hattori
Yamamoto, et al., Selfoc Microlens with a Spherical Surface, vol. 1, No. 6, Applied Optics (Mar. 15, 1982).

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