Microscope objective lens

Abstract

Abstract PURPOSE:To correct not only the aberration of the basic wavelength but also the color aberration with a simple constitution by making the second lens of three group lens constitution into the refraction factor distributing type lens in which the dispersion of the periphery are larger than that of the center of the lens. CONSTITUTION:In the constitution of the first and second refraction factor distributing type lenses and the third lens, the magnification is secured by the strong positive refraction force of the first lens and the image surface curving is corrected at strong curvature surface. The color aberration on the negative axis generated at the first lens is corrected by the second lens in which the dispersion of the periphery are larger than that of the center of the lens, and at the position where the beam height of the aperture beam to image-form the image point on the axis is the highest, the second lens is positioned. Consequently, with a very simple constitution, not only the aberration of the basic wavelength but also the color aberration are corrected sufficiently, and the lens system of the high performance can be obtained.

Inventors

• 👤 Katsuhiro Takada
• 👤 勝啓 高田

Bibliographic Details