公开(公告)号：US3719421A

公开(公告)日：1973-03-06

申请号：US3719421D

申请日：1971-12-10

Applicant: COMPTEURS COMP D

Inventor： POILLEUX J ,  TOURRET J

IPC: G01B11/02 ,  G01B11/03 ,  G01B11/24 ,  G01C3/08

CPC classification number: G01B11/026 ,  G01B11/24

Abstract: The optical device comprises a luminous source and an optical system for forming a primary image of the source on the surface whose position is to be determined. The optical system returns some of the light back from the primary image. A beam splitter is provided for splitting the returning light into two beams directed towards two secondary image points. Two optical elements are disposed respectively in these two beams, each optical element controlling the amount of light passing therethrough, and two photoelectric detectors are provided respectively behind the two optical elements to receive the light passing through. Preferably one of the optical elements is a field lens having a central screen, and the other optical element is a diaphragm having a central aperture of the same diameter as the screen. Alternatively both the optical elements can be constituted by field lenses each having a central screen.

Abstract translation: 光学装置包括光源和用于在要确定其位置的表面上形成源的主图像的光学系统。 光学系统从主图像返回一些光。 提供一个分束器，用于将返回的光分成两个指向两个二次图像点的光束。 两个光学元件分别设置在这两个光束中，每个光学元件控制通过光的量，并且两个光电检测器分别设置在两个光学元件的后面以接收通过的光。 优选地，一个光学元件是具有中心屏幕的场透镜，另一个光学元件是具有与屏幕直径相同的中心孔的光阑。 或者，两个光学元件可以由具有中心屏幕的场透镜构成。