OPTICAL IMAGING SYSTEM

PROBLEM TO BE SOLVED: To provide an optical imaging system which offers a short total length and high imaging quality.SOLUTION: An optical imaging system includes a main objective lens 20 and a reduction optical unit. The reduction optical unit comprises a first lens 22 having positive refractive po...

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Bibliographic Details
Main Authors MAERZ FRANZ, ARTUR HOEGELE
Format Patent
LanguageEnglish
Japanese
Published 13.04.2015
Subjects
BANDAGES, DRESSINGS OR ABSORBENT PADS
DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS
DIAGNOSIS
FILTERS IMPLANTABLE INTO BLOOD VESSELS
FIRST-AID KITS
FOMENTATION
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES
PHYSICS
PROSTHESES
SURGERY
TREATMENT OR PROTECTION OF EYES OR EARS
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Summary:PROBLEM TO BE SOLVED: To provide an optical imaging system which offers a short total length and high imaging quality.SOLUTION: An optical imaging system includes a main objective lens 20 and a reduction optical unit. The reduction optical unit comprises a first lens 22 having positive refractive power and a second lens 21 having negative refractive power. The first lens 22 is made from a first material having a first Abbe number and the second lens 21 is made from a second material having a second Abbe number, where the first Abbe number is greater than the second Abbe number. The lens system satisfies the following relational expression for a wavelength range (λ) of 480 nm≤λ≤660 nm and for a main wavelength e=546 nm. In the relational expression, frepresents an object-side focal length for the main wavelength (e) with respect to a first main plane (H), and frepresents an object-side focal length for the wavelength (λ) with respect to the first main plane (H), while f' represents an object-side focal length for the main wavelength (e) with respect to a second main plane (H'). 【課題】全長が短く、高い撮像品質を持つ光学撮像システムの提供。【解決手段】主対物レンズ２０と、縮小光学ユニットとを備え、縮小光学ユニットは正の屈折力を有する第１のレンズ２２、及び負の屈折力を有する第２のレンズ２１からなり、第１のレンズ２２は第１のアッベ数を有する第１の材料から製造され、第２のレンズ２１は第２のアッベ数を有する第２の材料から製造され、第１のアッベ数は第２のアッベ数より大きい。レンズ系は、波長λの範囲４８０ｎｍ λ ６６０ｎｍ及び主波長ｅ＝５４６ｎｍに関して以下の関係式を満たす。ｆe＝第１の主平面Ｈに対する、主波長ｅに関する対象側焦点距離；ｆλ＝第１の主平面Ｈに対する、波長λに関する対象側焦点距離；ｆe'＝第２の主平面Ｈ'に対する、主波長ｅに関する対象側焦点距離【選択図】図１
Bibliography:Application Number: JP20140196097