| 摘要 |
887,238. Slit diaphragms. PERKIN-ELMER CORPORATION. July 17, 1958 [July 19, 1957], No. 22924/58. Class 97(1). Method of manufacturing adjustable optical slits wherein a plate is provided with a slit, and is then affixed to supporting members, with the marginal portion of the plate on one side of the slit attached to one supporting member, and the marginal portion of the plate on the other side of the slit attached to the other supporting member, and wherein the upper and lower marginal portions of the plate are then removed, so that by relative movement of the supporting members the slit width can be adjusted. As shown in Fig, 1, a rigid plate 12 has photo-etched therein optical slits 10, 11 and a wider opening 13 midway between the slits, the slits and the opening having enlarged ends 14. The plate 12 is then attached to relatively movable supports 16, 17, Fig. 4, so that the member 16 carries those parts 20, 22 of the plate 12 which lie to the left of the slit 10 and between slits 13, 11 respectively, and the member 17 carries those parts 21, 23 of the plate 12 which li to the right of slit 11 and between slits 10, 13 respectively. The upper and lower marginal portions of the plate are then sheared off along the lines defined by the enlarged ends 14, so that the plate is now divided into the four separated parts 20, 21, 22,. 23, and the widths of the two slits 10, 11 can be simultaneously adjusted by relatively moving the supporting members 16, 17. The two slits may be used as the entry and exit slits respectively of a spectroscope. |
