JPS6454410A - Small-sized inverted galilean finder - Google Patents

Small-sized inverted galilean finder

Info

Publication number
JPS6454410A
JPS6454410A JP62209243A JP20924387A JPS6454410A JP S6454410 A JPS6454410 A JP S6454410A JP 62209243 A JP62209243 A JP 62209243A JP 20924387 A JP20924387 A JP 20924387A JP S6454410 A JPS6454410 A JP S6454410A
Authority
JP
Japan
Prior art keywords
lens group
refracting power
finder
positive
principal point
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
JP62209243A
Other languages
Japanese (ja)
Other versions
JP2612710B2 (en
Inventor
Satoru Ishizaka
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP62209243A priority Critical patent/JP2612710B2/en
Publication of JPS6454410A publication Critical patent/JPS6454410A/en
Application granted granted Critical
Publication of JP2612710B2 publication Critical patent/JP2612710B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Viewfinders (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To facilitate the manufacture and to compensate various aberrations excellently by composing the Inverted Galilean finder of a 1st lens group with negative refracting power, and 2nd lens group with positive refracting power, and a 3rd lens group with positive or negative refracting power. CONSTITUTION:This inverted Galilean finder consists of the 1st lens group with the positive refracting power, the 2nd lens group with the positive refracting power, and the 3rd lens group with the positive or negative refracting power in order from the object side so that expressions I and II hold. In the equation I, d1 is the interval (mm) between the pupil-side principal point of the 1st lens group and the object-side principal point of the 3rd lens group, d2 the interval (mm) between the pupil-side principal point of the 2nd lens group and the object- side principal point of the 3rd lens group, M the finder power, and phi1 the refracting power (1/mm) of the 1st lens group. Consequently, well-balanced aberration compensation is performed although the size is extremely small, and the excellent finder which provides good view is obtained.
JP62209243A 1987-08-25 1987-08-25 Small inverted Galileo finder Expired - Fee Related JP2612710B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62209243A JP2612710B2 (en) 1987-08-25 1987-08-25 Small inverted Galileo finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62209243A JP2612710B2 (en) 1987-08-25 1987-08-25 Small inverted Galileo finder

Publications (2)

Publication Number Publication Date
JPS6454410A true JPS6454410A (en) 1989-03-01
JP2612710B2 JP2612710B2 (en) 1997-05-21

Family

ID=16569730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62209243A Expired - Fee Related JP2612710B2 (en) 1987-08-25 1987-08-25 Small inverted Galileo finder

Country Status (1)

Country Link
JP (1) JP2612710B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106773009A (en) * 2016-11-18 2017-05-31 玉晶光电(厦门)有限公司 Eyepiece optical system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106773008B (en) * 2016-11-18 2020-02-21 玉晶光电(厦门)有限公司 Eyepiece optical system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168738U (en) * 1983-04-27 1984-11-12 キヤノン株式会社 Fine finder system
JPS6179806U (en) * 1984-10-29 1986-05-28
JPS61160416U (en) * 1985-03-27 1986-10-04
JPS61270721A (en) * 1985-05-27 1986-12-01 Nippon Kogaku Kk <Nikon> Magnification conversion type reverse galilean finder
JPS6255203U (en) * 1985-09-25 1987-04-06

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59168738U (en) * 1983-04-27 1984-11-12 キヤノン株式会社 Fine finder system
JPS6179806U (en) * 1984-10-29 1986-05-28
JPS61160416U (en) * 1985-03-27 1986-10-04
JPS61270721A (en) * 1985-05-27 1986-12-01 Nippon Kogaku Kk <Nikon> Magnification conversion type reverse galilean finder
JPS6255203U (en) * 1985-09-25 1987-04-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106773009A (en) * 2016-11-18 2017-05-31 玉晶光电(厦门)有限公司 Eyepiece optical system

Also Published As

Publication number Publication date
JP2612710B2 (en) 1997-05-21

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees