Patent
Immersion microscope objective
Toshinobu Suzuki
- 19 Nov 1993
43
TL;DR: An apochromat-class immersion microscope objective having a magnification of about 40, a NA of about 1.0, and a satisfactorily flattened image field is presented in this article.
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Abstract: An apochromat-class immersion microscope objective having a magnification of about 40, a NA of about 1.0, and a satisfactorily flattened image field. The microscope objective includes a first lens unit G1 of positive refractive power which has a cemented lens composed of a plano-convex lens and a meniscus lens having a strong concave surface directed toward the object side, a second lens unit G2 having a cemented lens composed of three lens elements, that is, negative, positive and negative lenses, a third lens unit G3 having a cemented lens, a fourth lens unit G4 including a cemented meniscus lens having a strong concave surface directed toward the image side, and a fifth lens unit G5 including a cemented meniscus lens composed of a negative lens and a positive lens and having a strong concave surface directed toward the object side. The microscope objective satisfies conditions concerning the refractive index difference between the first and fifth lens units, the focal lengths of the first and fourth lens units, and the back focus of the entire system.
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Citations
Patent
Liquid immersion microscope objective
Rolf Wartmann,Joerg Sprenger +1 more
- 14 Jul 2005
TL;DR: In this paper, an immersion microscope objective contains four lens groups with a collecting effect and a diverging effect, where the diverging lens is made from a material with a partial dispersion of a second type.
7
Patent
Objective lens system
Hiroshi Yamada,Yutaka Suenaga,Itoe Ito +2 more
- 10 Sep 1996
TL;DR: In this paper, an apochromat-grade microscope objective lens system is presented, which can be machined cheaply and easily by the conventional technology, which is well corrected for chromatic aberration, and which is excellent in flatness of the image plane.
7
Patent
Objective lens systems
Hiroshi Yamada,Yutaka Suenaga,Itoe Ito +2 more
- 23 Sep 1997
TL;DR: In this paper, an apochromat-grade microscope objective lens system is presented, which can be machined cheaply and easily by the conventional technology, which is well corrected for chromatic aberration, and which is excellent in flatness of the image plane.
6
Patent
Optical arrangement for high power microobjective
Keshav D. Sharma
- 07 Jul 2003
TL;DR: In this paper, an arrangement of lenses for a 100×, oil immersion microscope objective is presented, which gives a flat field of view with diffraction limited performance over all the field.
6
Patent
Laser scanning microscope system
Masayoshi Saito,Eiji Yokoi,Kenichi Kusaka +2 more
- 29 Oct 2010
TL;DR: In this paper, an immersion microscope objective consisting of thirteen or fewer lens elements is described, in order from the object side, first and second lens groups of positive refractive power, a third lens group, a fourth lens group having negative refractive powers with its image-side surface being concave, and a fifth lens group with its object-side surfaces having concave.
5
References
Patent
Microscope objective lens
Yutaka Suenaga,Katsuya Watanabe +1 more
- 29 Mar 1985
TL;DR: A microscope objective lens can always maintain an excellent imaging performance even if the thickness of a parallel flat plate such as a cover glass disposed between the object surface and the objective lens is greatly varied.
38
Patent
Liquid-immersion type objective lens system for microscopes
Yoshiharu Saito
- 28 Mar 1994
TL;DR: In this paper, a liquid-immersion type objective lens system for microscopes is presented, which is capable of correcting variations of aberrations by moving the second lens unit relative to the first lens unit and the third lens unit in accordance with a thickness of a cover glass plate used in combination with the objective lens.
25
Patent
Liquid immersion system microscope objective lens
Toshinobu Suzuki,鈴木敏信 +1 more
- 20 Nov 1992
TL;DR: In this paper, the authors provided a lens of an apochromat class in which flatness of the image surface is satisfactory by constituting it of a lens group, etc., provided with a cemented lens of a plano-convex lens and a meniscus lens, and specifying its refractive index, focal distance and focal position.
18
Patent
Eight component 100x microscope objective
Arthur H Shoemaker
- 17 Mar 1971
TL;DR: An eight component apochromatic oil immersion microscope objective with a magnification of substantially 100X and a numerical aperture of substantially 1.30 is described in this paper, which is the state-of-the-art.
14
Patent
Objective for microscopes
Toshinobu Suzuki
- 28 Oct 1992
TL;DR: In this paper, the authors proposed an objective with a corrector ring for microscopes that is of about 40 magnifications and has an NA of 0.93 with well-corrected aberrations over an ultra wide field range, and is less likely to degrade in performance due to a thickness variation of the cover glass.
13
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