Claims
- 1. An optical member inspection apparatus, comprising:a light source; means for diffusing light emitted from said light source, said diffusing means comprising a central portion and a peripheral portion, a diffusion transmittance of said peripheral portion being higher than that of said central portion; means for photographing an optical member to be inspected, said photographing means being positioned to receive light emitted from said light source and transmitted through said diffusing means and said optical member; means for judging whether or not said optical member has a defect, in accordance with image signal output from said photographing means; wherein said central portion and said peripheral portion are each variable in shape; wherein said optical member inspection apparatus further comprises means for setting each shape of said central portion and said peripheral portion; wherein said diffusing means comprises a liquid crystal panel including a plurality of segments, a diffusion transmittance of each segment being varied in accordance with a voltage applied thereto; and wherein said setting means sets each shape of said peripheral portion and said central portion by controlling said voltage to said each segment.
- 2. The optical member inspection apparatus in accordance with claim 1, wherein said setting means sets said shape of said central portion such that light emitted perpendicularly from said central portion substantially corresponds to a size and shape of said optical member.
- 3. The optical member inspection apparatus in accordance with claim 1, wherein said setting means sets each shape of said central portion and said peripheral portion to be a shape similar to a plan shape of said optical member.
Priority Claims (14)
Number |
Date |
Country |
Kind |
7-164825(P) |
Jun 1995 |
JP |
|
7-164826(P) |
Jun 1995 |
JP |
|
7-164827(P) |
Jun 1995 |
JP |
|
7-172911(P) |
Jun 1995 |
JP |
|
7-175518(P) |
Jun 1995 |
JP |
|
7-175519(P) |
Jun 1995 |
JP |
|
7-184795(P) |
Jun 1995 |
JP |
|
7-189844(P) |
Jul 1995 |
JP |
|
7-189853(P) |
Jul 1995 |
JP |
|
7-208398(P) |
Jul 1995 |
JP |
|
7-208399(P) |
Jul 1995 |
JP |
|
7-208400(P) |
Jul 1995 |
JP |
|
7-221120(P) |
Aug 1995 |
JP |
|
8-101834(P) |
Apr 1996 |
JP |
|
Parent Case Info
This Application is a division of Ser. No. 08/658,549 filed Jun. 5, 1996, now U.S. Pat. No. 6,148,097.
US Referenced Citations (6)
Non-Patent Literature Citations (4)
Entry |
Japanese Unexamined Patent Publication No. 5-342356. |
Japanese Unexamined Patent Publication No. 6-139341. |
Japanese Unexamined Patent Publication No. 6-348824. |
Japanese Unexamined Patent Publication No. 5-85168. |