| 摘要 |
PURPOSE:To make it easy to eliminate colors on an axis and of magnification by cementing the final constituent element of an objective system to the incidence end of an optical fiber bundle for image transmission, and thus preventing dust from sticking the end surface of the optical fiber bundle while making the generation of a flare hard and the size small. CONSTITUTION:The lens thickness of the cemented lens consisting of the convex lens 7 and concave lens 8 of an endoscope is increased to connect the incidence end surface of an image guide fiber 9 directly, and it is fixed through a ring 10. Consequently, a flare becomes hard to generate and the size is reduced; and no dust sticks to the tip of thefiber 9. Further, the optical constant of the cemented lens is selected properly to eliminate colors on the axis and of magnification easily. |
