| US 7,557,994 B2 | ||
| Optical device, transfer mold, and image pickup apparatus | ||
| Shunji Kamijima, Suwa (Japan) | ||
| Assigned to Seiko Epson Corporation, Tokyo (Japan) | ||
| Filed on Dec. 20, 2007, as Appl. No. 11/961,672. | ||
| Prior Publication US 2008/0158687 A1, Jul. 03, 2008 | ||
| Int. Cl. G02B 27/12 (2006.01); G02B 27/10 (2006.01) | ||
| U.S. Cl. 359—640 [359/626] | 11 Claims |
| 1. An image pickup apparatus, comprising:
an image pickup device having a plurality of light-receiving elements arranged in a matrix;
an image picking lens guiding light to the image pickup device; and
an optical device comprising:
a refracting surface refracting light;
a flat surface transmitting light; and
a prism group including prism elements having at least the refracting surface,
the prism elements being arranged with a plurality of pitches therebetween on a straight line parallel to a reference surface
on which the prism elements are disposed;
the optical device being disposed in an optical path between the image picking lens and the image pickup device.
|