METHOD OF PREVENTING INTERNAL SURFACE REFLECTION ON INTERNAL SURFACE OF CAMERA LENS BARREL PORTION, END SURFACE PORTION OF LENS, ETC., AND CAMERA LENS BARREL PORTION AND OPTICAL SYSTEM HAVING BEEN SUBJECTED TO INTERNAL SURFACE REFLECTION PREVENTION PROCESSING

摘要

<P>PROBLEM TO BE SOLVED: To provide a camera lens barrel portion and an optical system whose reflection factors are suppressed ≤1% by forming a black coating film which is excellent in adhesion and free of dust production dependence on the quality of a base and without requiring primer processing etc. Ž<P>SOLUTION: The camera lens barrel portion is subjected to the reflection prevention processing for preventing internal surface reflection by coating a unit and respective components forming the optical system, such as the internal surface of the camera lens barrel portion and the end surface portion of the lens with black paint. The optical system thereof is also provided. The black coating film is formed which has an extremely low reflection factor of 0.35 to 0.7% in a wide wavelength range of 380 to 780 nm by applying the black paint regardless of the quality of the material forming the camera lens barrel and optical system. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž