GB190903060A - Improvements in Erecting Eyepieces for Telescopes, Microscopes, and the like. - Google Patents

Improvements in Erecting Eyepieces for Telescopes, Microscopes, and the like.

Info

Publication number
GB190903060A
GB190903060A GB190903060DA GB190903060A GB 190903060 A GB190903060 A GB 190903060A GB 190903060D A GB190903060D A GB 190903060DA GB 190903060 A GB190903060 A GB 190903060A
Authority
GB
United Kingdom
Prior art keywords
lens
eyepieces
telescopes
microscopes
erecting
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.)
Expired
Application number
Inventor
Harold Alfred Hunter Christie
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB190903060A publication Critical patent/GB190903060A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B25/00—Eyepieces; Magnifying glasses
    • G02B25/001—Eyepieces

Landscapes

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

Abstract

3060. Christie, H. A. H. Feb. 8. Eyepieces.-In four-lens erecting-eyepieces for telescopes, microscopes, &c., the field lens 1 is made of greater focal length than usual, and the second meniscus lens 2, of comparatively short focal length, is placed slightly beyond the first stop 5 and at, or near, the principal focus of the lens 1 to form an image of about the same size as that formed by this field lens. The conjugate foci are about equidistant on either side of the lens 2, which may be made as a doublet to reduce spherical aberation. The third lens 3, which with the eye lens 4 forms a negative combination, preferably consists of two meniscus components, as shown. The eyepiece may be positive or negative, and is much shorter than usual. Constructional data are given.
GB190903060D 1909-02-08 1909-02-08 Improvements in Erecting Eyepieces for Telescopes, Microscopes, and the like. Expired GB190903060A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190903060T 1909-02-08

Publications (1)

Publication Number Publication Date
GB190903060A true GB190903060A (en) 1910-01-27

Family

ID=32553932

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190903060D Expired GB190903060A (en) 1909-02-08 1909-02-08 Improvements in Erecting Eyepieces for Telescopes, Microscopes, and the like.

Country Status (1)

Country Link
GB (1) GB190903060A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086000A (en) * 1976-08-23 1978-04-25 Bell & Howell Company Viewfinder optics with zero power doublet
US4571036A (en) * 1981-10-29 1986-02-18 Rolin J. Gebelein Reflecting telescope with correcting lens
US4718753A (en) * 1981-10-29 1988-01-12 Gebelein Rolin J Telescope with correcting lens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4086000A (en) * 1976-08-23 1978-04-25 Bell & Howell Company Viewfinder optics with zero power doublet
US4571036A (en) * 1981-10-29 1986-02-18 Rolin J. Gebelein Reflecting telescope with correcting lens
US4718753A (en) * 1981-10-29 1988-01-12 Gebelein Rolin J Telescope with correcting lens

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