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US 7,256,952 B2Granted
Fixation method for optical member and optical unit
AssigneeCanon Kabushiki Kaisha
InventorMasato Seita
Life of this patent
Estimating the term…
Abstract
A fixation method for fixing an optical member to a holding member using irradiation of a laser beam. The method includes the steps of inserting the optical member into the holding member, providing a fixing member, mounting the fixing member to the holding member having the optical member positioned therebetween, and irradiating laser beams on the holding member through the fixing member.
Claims8
A fixation method for fixing a lens to a holding member by irradiating a laser beam, comprising the steps of:
- inserting the lens into the holding member made of a laser beam absorbent material;
- mounting a fixing member to the holding member in which the lens is inserted, the fixing member being made of a laser beam transparent material, the fixing member including a first portion and a second portion, the first portion directly contacting with the holding member and the second portion directly contacting with the lens;
- and
- irradiating laser beams only on the first portion of the fixing member and welding only an area where the fixing member and the holding member are contacting.
1 more element
An optical unit comprising:
- a lens;
- a holding member configured to hold the lens, the holding member including a wall portion configured to face an outer circumference portion of the lens, the holding member being made of a laser beam absorbent material;
- and
- a fixing member including a first portion directly contacting with an end of the wall portion of the holding member and a second portion directly contacting with the outer circumference portion of the lens, the fixing member being made of a laser beam transparent material, the fixing member being mounted to the holding member in which the lens is inserted such that the first portion directly contacts with the holding member and the second portion directly contacts with the lens,
- wherein only an area where the fixing member and the holding member are contacting is being welded by irradiating a laser beam only on the first portion of the fixing member.
2 more elements
Dependencies are inferred from the claim text.