| 摘要 |
PROBLEM TO BE SOLVED: To make it easy to put or take lenses in or out of a resin case which houses a plurality of lenses and to prevent damages from occurring to optical surfaces and the like of the lenses by a method wherein the case internal surface contacting with the surfaces other than the optical surfaces of the lenses is made at least partly rough. SOLUTION: Optical surfaces 301 and 302 of a lens 3 are positioned respectively at the inside of protuberant end faces 321 and 331 of protuberant parts 32 and 33 at the front and the rear. Further, fitting walls 113 at both sides of a lens housing case cover 1 having both of side walls 111, 112, both of stepped parts 121, 122 and a ceiling part 123 at its inside are fitted and stuck to fitting parts 22 at both sides of a lens housing case base 2 having a lens support 21, thereby forming a barrel-like part 10. Then, the lenses 3 are housed, being inserted into the barrel-like part 10, starting successively from their ends. At least a par of the barrel-like part 10 contacting with the surfaces other than the optical surfaces of the lenses 3 is formed in a matlike rough surface in the roughness having the depth in 1-100μm and protuberances and indents each in 0.05-1 mm of distance.
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