| 摘要 |
PROBLEM TO BE SOLVED: To provide a depression and elevation angle varying lens barrel which is made inexpensive in structure without upsizing of the device, eliminates the possibility of missing depending upon the forms of use and is unable in systems exclusive of an afocal optical system as there is no change in lens barrel lengths. SOLUTION: When the angles (depression and elevation angle) at which a first lens barrel member 21 and a second lens barrel member 22 intersect are minimized, stopper parts 35 and 36 disposed at the first lens barrel member 21 and stopper parts 37 and 38 disposed at the second lens barrel member 22 butt against a holding member 25 of an optical axis deflecting optical member 24 to fix the angle of the optical axis deflecting optical member 24. The second lens barrel member 22 attains the angle at which the optical axis deflecting optical member 24 deflects the optical axis of the incident light on the first lens barrel member 21 and introduces this light to the second lens barrel member 22. |
