JPS6410226A - Range finder for camera - Google Patents

Range finder for camera

Info

Publication number
JPS6410226A
JPS6410226A JP16522887A JP16522887A JPS6410226A JP S6410226 A JPS6410226 A JP S6410226A JP 16522887 A JP16522887 A JP 16522887A JP 16522887 A JP16522887 A JP 16522887A JP S6410226 A JPS6410226 A JP S6410226A
Authority
JP
Japan
Prior art keywords
lens
fresnel
light
refractive
range finder
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.)
Pending
Application number
JP16522887A
Other languages
Japanese (ja)
Inventor
Masao Yokoyama
Mutsuhito Yoshima
Kohei Ota
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 JP16522887A priority Critical patent/JPS6410226A/en
Publication of JPS6410226A publication Critical patent/JPS6410226A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)

Abstract

PURPOSE:To make an optical lens for a range finder thinner by making at least one surface of a light projecting lens or a light receiving lens a Fresnel surface. CONSTITUTION:At least one surface of the light projecting lens or the light receiving lens is made to be the Fresnel surface. For example, the refractive surface of the light projecting lens 10 on a side where a conjugational distance is long (an object 3 side) is made to be the Fresnel surface 10a and the refractive surface on a side where the conjugational distance is short (a light source projecting light 1 side) is made to be an aspheric surface 10b. The Fresnel surface 10a is obtained by providing plural saw tooth ring band refractive surfaces on a plane and the tilt of the respective ring band refractive surfaces is made the same as the tilt in a spot corresponding to the aspheric surface lens. By using the Fresnel lens like this, the thickness of the lens can be made extremely thin while the lens is working like the aspheric surface lens.
JP16522887A 1987-07-03 1987-07-03 Range finder for camera Pending JPS6410226A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16522887A JPS6410226A (en) 1987-07-03 1987-07-03 Range finder for camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16522887A JPS6410226A (en) 1987-07-03 1987-07-03 Range finder for camera

Publications (1)

Publication Number Publication Date
JPS6410226A true JPS6410226A (en) 1989-01-13

Family

ID=15808292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16522887A Pending JPS6410226A (en) 1987-07-03 1987-07-03 Range finder for camera

Country Status (1)

Country Link
JP (1) JPS6410226A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006267768A (en) * 2005-03-25 2006-10-05 Fuji Photo Film Co Ltd Photographing device and light projecting module

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006267768A (en) * 2005-03-25 2006-10-05 Fuji Photo Film Co Ltd Photographing device and light projecting module

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