眼角膜曲率仪的测量和设计

眼角膜曲率仪又称角膜计。是应用光学方法测量人眼眼球角膜半径的一种光学仪器。测量是通过光学系统中的两个光标,从角膜反射经透镜组和两组光楔测微补偿器的轴向调节来测出两个光标像的间隔,再计算出曲率半径。本文最后部分分析了影响被测半径精度的各种因素。

Design and Measurement of Ophthalmometer

Ophthalmometer is an optical instrument to measure the cornea radius of man's eyeball.In the optical system, two optical graticules reflected by the cornea go through the lenses and two sets of wege microcompen-sators. The image separation of two optical graticules can be measured by the axial adjustment of the compensators, and then the cornea radius can be calculated.In the last part of this article, various factors affecting the measuring accuracy of the radius is discussed.