Optical-member inspection apparatus and holder for inspection target member
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorsKiyoshi Yamamoto, Masayuki Sugiura, Taichi Nakanishi, Takashi Tohara, Masato Hara
Life of this patent
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Abstract
A holder is constructed of a cylindrical member made of a metal and an inward flange member made of a diffusion transparent member. The inside of the cylindrical member is sectioned into a tapered area whose inside diameter decreases downward, and a small-diameter cylindrical area and a large-diameter cylindrical area. The inward flange member is bonded to the bottom end of the small-diameter cylindrical area.
Claims15
A holder for holding an outer margin of an optical member, comprising:
- a cylindrical enclosure portion having an inside width larger than an outside width of the optical member;
- and
- a protrusion made of a diffusion transparent member, the protrusion restricting movement of the optical member in the enclosure portion by contacting the outer margin of the optical member;
- an inside of said enclosure portion having a shape in which large inside diameter portions and small inside diameter portions are alternately repeated along a circumferential direction, and
- a plurality of protrusions protrude from the small-inside-diameter portions inside of the enclosure portion.
A holder for holding an outer margin of an optical member, comprising:
- a frame shaped base portion;
- and
- a plurality of spaced optical-member holding portions provided to the base portion so as to enclose a space for supporting the optical member formed in the base portion, each of said optical-member holding portions having a receiving face on which the outer margin of the optical member is mounted and a restriction wall to restrict movement of the optical member mounted on the receiving face by contacting the outer margin of the optical member, said receiving face contacting the outer margin of a face of the optical member through which light passes during operation of the optical member, said restricting wall being located above said receiving face.
An optical-member inspection apparatus for obtaining image data used for inspections by applying illumination light to an optical member from one side thereof and photographing the same optical member from the other side, comprising:
- a holder comprising a frame shaped base portion and a plurality of spaced optical-member holding portions provided on the base portion so as to enclose a space for supporting the optical member formed in the base portion, each of said optical-member holding portions having a receiving face on which the outer margin of the optical member is mounted and a restriction wall to restrict movement of the optical member mounted on the receiving face by contacting the outer margin of the optical member, said receiving face contacting the outer margin of a face of the optical member through which light passes during operation of the optical member, said restricting wall being located above said moving face.
Dependencies are inferred from the claim text.