| 摘要 |
The endoscope objective lens is used in the field of endoscopy for examining human internal organs and, more specifically, in video endoscopy. In the endoscope objective lens which is comprised of two components separated by an aperture diaphragm, the first component I having an optical power phi1 and comprising a negative meniscus lens, the concave side of which faces the image, and a plano-convex lens with an optical power phi2, and the second component II having an optical power phiII and comprising a cemented lens with an optical power phi3 4, which consists of a negative and a positive lens with optical powers phi3 and phi4, the first component I has a negative optical power, and the second component II has a positive optical power, and a double-convex lens with an optical power phi5 is provided in front of the cemented lens in the second component II. The optical powers of the lenses and the components satisfy the following conditions: 0.35<|phi1 / phi|<0.45 0.5<phiiotaiota/ phi <0.6 0.35<phi5|<0.5 0.15<phi2<0.25 0.65<|phi3/ phi4|<0.75 0.97<d phi <1.05, where phi is the optical power of the objective lens as a whole, and d is the distance between the first and second lenses I of a component. This provides an acceptable image quality across the entire range of adjustment of the flange focal length (from 3 to 100 mm), and an increase in the angular field of view to 2omega=150-160°. |
| 申请人 |
OTKRYTOE AKTSIONERNOE OBSHCHESTVO "LOMO";SOKOLSKY, MIKHAIL NAUMOVICH;SOVZ, IRINA EVGENYEVNA;VARLAMOVA, LARISA LEONIDOVNA;BOGOMOLOVA, LUDMILA EVGENYEVNA |
发明人 |
SOKOLSKY, MIKHAIL NAUMOVICH;SOVZ, IRINA EVGENYEVNA;VARLAMOVA, LARISA LEONIDOVNA;BOGOMOLOVA, LUDMILA EVGENYEVNA |
