The invention discloses a large-visual field high-performance ultra-small
microscope objective lens. The large-visual field high-performance ultra-small
microscope objective lens is a catadioptric optical
system, and comprises a first lens and a second lens sequentially along an
optical axis direction, wherein both the first lens and the second lens are
meniscus lenses, the surface facing an object surface is a
concave surface, the surface facing an image surface is a convex surface, the object surface-facing surface of the first lens is a front surface, the image surface-facing surface of thesecond lens is a rear surface, and both surfaces are coated with half transparent and half reflecting
optical medium spectrophotometric films; an aperture diaphragm is located on the rear surface facing the image surface of the first lens; the front end, located on the front surface of the first lens, of the object surface has a far limiting position; and the rear end, located on the rear surfaceof the second lens, of the image surface has a far limiting position. By adopting the catadioptric structure, the maximum
diffraction path of light in the
system is realized concisely, and the
diffraction limit is reached. One embodiment of the invention realizes that the
diameter of the visual field range is 1 mm, the
numerical aperture is 0.6, the total
system length is 4.23 mm, the
magnification is 5.14, and the imaging resolution is 0.24 microns / pixel.