Claims
- 1. A photometric apparatus for a camera, comprising:a plate-shaped photometer window on an outermost side, a photometric optical system provided separately from a photographic optical system, and a light-receiving element for photometry, said photometric optical system having at least one diffractive optical element having at least one diffraction surface, and said diffractive optical element having a lens action, wherein: said diffractive optical clement has said diffraction surface on a front side thereof.
- 2. A photometric apparatus for a camera, comprising:a plate-shaped photometer window on an outermost side, a photometric optical system provided separately from a photographic optical system, and a light-receiving element for photometry, said photometric optical system consisting of one diffractive optical element having at least one diffraction surface, and said diffractive optical element having a lens action, wherein: said diffractive optical element has said diffraction surface on a front side thereof.
- 3. A photometric apparatus according to claim 1, wherein said diffractive optical element and said light-receiving element for photometry are integral with each other.
- 4. A photometric apparatus according to claim 1, wherein a bundle of light rays is deflected by said diffractive optical element.
- 5. A photometric apparatus according to claim 1, wherein said diffraction surface has a curvature.
- 6. A photometric apparatus according to claim 1, wherein said diffractive optical element comprises a plastic substrate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-129998 |
May 1996 |
JP |
|
Parent Case Info
This is a division of application Ser. No. 08/863,005, filed May 23, 1997, now U.S. Pat. No. 6,072,959.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
5-27304 |
Feb 1993 |
JP |
6-250251 |
Sep 1994 |
JP |