JPS552215A - Optical system - Google Patents

Optical system

Info

Publication number
JPS552215A
JPS552215A JP7392878A JP7392878A JPS552215A JP S552215 A JPS552215 A JP S552215A JP 7392878 A JP7392878 A JP 7392878A JP 7392878 A JP7392878 A JP 7392878A JP S552215 A JPS552215 A JP S552215A
Authority
JP
Japan
Prior art keywords
lens
prism
pechant
backward
length
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7392878A
Other languages
Japanese (ja)
Other versions
JPS6118725B2 (en
Inventor
Hirobumi Matsuo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP7392878A priority Critical patent/JPS552215A/en
Publication of JPS552215A publication Critical patent/JPS552215A/en
Publication of JPS6118725B2 publication Critical patent/JPS6118725B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Telescopes (AREA)
  • Lenses (AREA)

Abstract

PURPOSE: To make possible the use of a pechant prism of a long optical length by disposing a negative lens as a correcting lens in front of the prism in a telescope using an interchangeable lens for single-lens reflect cameras as an objective lens.
CONSTITUTION: A negative lens of a focal length fc consisting of a single lens or cemented lens is disposed as a correcting lens in front of a prism to move the imaging point by the objective lens backward, by which the use of a pechant prism P of a relatively long optical path length is made possible. Where the focal length of the eyepiece lens part E backward of the prism P is let fE, the conditions of formulas (1), (2) are satisfied. The use of the pechant prism under such conditions becomes feasible and it becomes also possible to place the optical axes of the objective lens and eyepiece lens of the same straight line.
COPYRIGHT: (C)1980,JPO&Japio
JP7392878A 1978-06-19 1978-06-19 Optical system Granted JPS552215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7392878A JPS552215A (en) 1978-06-19 1978-06-19 Optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7392878A JPS552215A (en) 1978-06-19 1978-06-19 Optical system

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP3989184A Division JPS59187311A (en) 1984-03-01 1984-03-01 Telescope attachment for interchangeable lens

Publications (2)

Publication Number Publication Date
JPS552215A true JPS552215A (en) 1980-01-09
JPS6118725B2 JPS6118725B2 (en) 1986-05-14

Family

ID=13532279

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7392878A Granted JPS552215A (en) 1978-06-19 1978-06-19 Optical system

Country Status (1)

Country Link
JP (1) JPS552215A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4867549A (en) * 1987-05-08 1989-09-19 Nikon Corporation Re-imaging optical system
CN1069743C (en) * 1996-09-17 2001-08-15 蒂业技凯株式会社 Ball connecting body, and linear guide device and ball screw deivce utilizing ball connecting body
US20120069432A1 (en) * 2010-09-18 2012-03-22 Tonta Electro Optical Co., Ltd. Optical device for coupling to a camera lens to form a visual observation system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0525474Y2 (en) * 1988-05-27 1993-06-28
JPH0787932A (en) * 1993-01-11 1995-04-04 Snow Brand Food Co Ltd Controller of smoke house and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4867549A (en) * 1987-05-08 1989-09-19 Nikon Corporation Re-imaging optical system
CN1069743C (en) * 1996-09-17 2001-08-15 蒂业技凯株式会社 Ball connecting body, and linear guide device and ball screw deivce utilizing ball connecting body
US20120069432A1 (en) * 2010-09-18 2012-03-22 Tonta Electro Optical Co., Ltd. Optical device for coupling to a camera lens to form a visual observation system

Also Published As

Publication number Publication date
JPS6118725B2 (en) 1986-05-14

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