JPS57186727A - Lens with image rotational prism - Google Patents

Lens with image rotational prism

Info

Publication number
JPS57186727A
JPS57186727A JP7065981A JP7065981A JPS57186727A JP S57186727 A JPS57186727 A JP S57186727A JP 7065981 A JP7065981 A JP 7065981A JP 7065981 A JP7065981 A JP 7065981A JP S57186727 A JPS57186727 A JP S57186727A
Authority
JP
Japan
Prior art keywords
lens
positive
negative
nup
magnification
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
JP7065981A
Other languages
Japanese (ja)
Other versions
JPS6155090B2 (en
Inventor
Norikazu Arai
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 JP7065981A priority Critical patent/JPS57186727A/en
Publication of JPS57186727A publication Critical patent/JPS57186727A/en
Publication of JPS6155090B2 publication Critical patent/JPS6155090B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To correct chromatic aberration of magnification while reducing a Petzval's sum by correcting the curvature of a sagital image plane by substituting lenses in a Gaussian front group by a positive, a negative and a positive element in order. CONSTITUTION:A lens system consists of a positive lens (Abbe number nu1), a negative lens (nu2 and radius r4 of curvature of image flank) and a positive meniscus lens (nu3) in a front goup (focal length ff), and a cemented negative lens of a negative lens and a positive lens (refractive index n5), a positive meniscus lens (n6) and a biconvex lens (n7) in a rear group (fR) while both groups are at an interval d6 of air, and a roof prism (nP, nuP, and bottom surface length L) having a 45 deg. bottom angle is arranged between the front and rear groups. When the focal length of the whole system is (f) and magnification is M, the system meets requirements; ff/fR-0.03<M<ff/fR+0.03, 1.7<nP, 45<nuP, 45< (nu1+nu2+nu3)/3, 0.065<r4/ff<0.13.
JP7065981A 1981-05-13 1981-05-13 Lens with image rotational prism Granted JPS57186727A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7065981A JPS57186727A (en) 1981-05-13 1981-05-13 Lens with image rotational prism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7065981A JPS57186727A (en) 1981-05-13 1981-05-13 Lens with image rotational prism

Publications (2)

Publication Number Publication Date
JPS57186727A true JPS57186727A (en) 1982-11-17
JPS6155090B2 JPS6155090B2 (en) 1986-11-26

Family

ID=13437997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7065981A Granted JPS57186727A (en) 1981-05-13 1981-05-13 Lens with image rotational prism

Country Status (1)

Country Link
JP (1) JPS57186727A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009237433A (en) * 2008-03-28 2009-10-15 Seiko Epson Corp Projection apparatus and image display apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009237433A (en) * 2008-03-28 2009-10-15 Seiko Epson Corp Projection apparatus and image display apparatus
US8820943B2 (en) 2008-03-28 2014-09-02 Seiko Epson Corporation Projection apparatus and image display apparatus having a reflector and an optical system with a cut off portion

Also Published As

Publication number Publication date
JPS6155090B2 (en) 1986-11-26

Similar Documents

Publication Publication Date Title
JPS54157620A (en) Photographic telephoto lens
JPS5694317A (en) Photographic lens of small size
JPS5659217A (en) Lens for compact camera of short overall length using aspherical face
JPS5691206A (en) Wide-angle photographic lens of short overall length
DE3780741D1 (en) COMPACT WIDE-ANGLE LENS.
EP0340647A3 (en) Apochromat optical system
JPS5643618A (en) Attachment lens
JPS5595920A (en) Rear attachment lens
JPS56135815A (en) Lens for optical scanning
JPS57135911A (en) Small-size photographic lens
JPS54158225A (en) Photographic lens having long back focus and large aperture ratio
JPS5779909A (en) Optical system for astronomical telescope
JPS57186727A (en) Lens with image rotational prism
JPS5444519A (en) Wide angle leins
JPS64512A (en) Albada system zoom finder
JPS57171309A (en) Lens for compact camera having short total length
JPS557712A (en) Compact standard zoom lens
JPS5643619A (en) Wide angle zoom lens
JPS5451826A (en) Photographic lens
JPS56119109A (en) Wide angle zoom lens
GB1432641A (en) Wide angle lenses
JPS56132306A (en) Small-sized zoom lens
JPS57197508A (en) Small-sized retrofocus type wide-angle lens
JPS57130009A (en) Large-aperture lens
JPS5740219A (en) Photographic lens with short length