| 摘要 |
PURPOSE:To prevent a damage on the upper surface of a light transmission cap by bonding a light transmission film through an Si adhesive on the upper surface of the cap. CONSTITUTION:A polyester film 6 having good light transmission is bonded to the outer surface of a BSG cap 4 without colorant with Si adhesive 7 having good light transmission. Thus, it can prevent the surface of the BSG4 from damaging, and the cap passing light is not disturbed linearly to accurately collect an image to a CCD element 2. When the adhesive 7 is coated only the peripheral edge and bonded, the bonding strength of the film is deteriorated, but Si adhesive having insufficient light transmission can be used. |
