GB546035A - Improvements in or relating to optical objectives - Google Patents

Improvements in or relating to optical objectives

Info

Publication number
GB546035A
GB546035A GB1802540A GB1802540A GB546035A GB 546035 A GB546035 A GB 546035A GB 1802540 A GB1802540 A GB 1802540A GB 1802540 A GB1802540 A GB 1802540A GB 546035 A GB546035 A GB 546035A
Authority
GB
United Kingdom
Prior art keywords
convergent
divergent
taylor
objective
focal 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.)
Expired
Application number
GB1802540A
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.)
Taylor Taylor and Hobson Ltd
Original Assignee
Taylor Taylor and Hobson 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 Taylor Taylor and Hobson Ltd filed Critical Taylor Taylor and Hobson Ltd
Priority to GB1802540A priority Critical patent/GB546035A/en
Publication of GB546035A publication Critical patent/GB546035A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/34—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having four components only

Abstract

546,035. Lenses. TAYLOR, TAYLOR & HOBSON, Ltd., and WYNNE, C. G. Dec. 23, 1940, No. 18025. [Class 97 (i)] In an objective comprising four air-spaced components, of which the first and third are convergent and the second a compound divergent meniscus with air-exposed surfaces convex to the front, the radius of the front surface Re of the third component is numerically greater than 2.5 times the equivalent focal length of the objective and is positive or negative. The fourth component may be of zero power or be slightly convergent, may comprise a divergent element cemented in front of a convergent element having a mean refractive index between .06 and .12 greater than that of the divergent element, and may have an axial thickness lying between .2 and .35 times the equivalent focal length. Data for one example are set out. Specification 407,156 is referred to.
GB1802540A 1940-12-23 1940-12-23 Improvements in or relating to optical objectives Expired GB546035A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1802540A GB546035A (en) 1940-12-23 1940-12-23 Improvements in or relating to optical objectives

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1802540A GB546035A (en) 1940-12-23 1940-12-23 Improvements in or relating to optical objectives

Publications (1)

Publication Number Publication Date
GB546035A true GB546035A (en) 1942-06-24

Family

ID=10105341

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1802540A Expired GB546035A (en) 1940-12-23 1940-12-23 Improvements in or relating to optical objectives

Country Status (1)

Country Link
GB (1) GB546035A (en)

Similar Documents

Publication Publication Date Title
GB538653A (en) Improvements in or relating to optical objectives
GB547739A (en) Improvements in or relating to optical objectives
GB546035A (en) Improvements in or relating to optical objectives
GB522651A (en) Improvements in or relating to optical objectives
GB564133A (en) Improvements in or relating to optical objectives
GB544658A (en) Improvements in or relating to optical objectives
GB530506A (en) Improvements in or connected with eye-pieces for optical instruments
GB561156A (en) Improvements in or relating to optical objectives
GB555464A (en) Improvements in or relating to photographic objectives
GB579521A (en) Improvements in or relating to telephoto lenses
GB532950A (en) Improvements in or relating to optical objectives
GB542508A (en) Improvements in or relating to optical objectives
GB564306A (en) Improvements in or relating to photographic objectives
GB565851A (en) Improvements in or relating to optical eyepieces
GB523218A (en) Improvements in or relating to optical objectives
GB855706A (en) Three-component photographic objective
GB506321A (en) Improvements in microscope objectives
GB681456A (en) High aperture objectives
GB523446A (en) Improvements in or relating to optical objectives
GB568319A (en) Improvements in or relating to optical objectives
GB714565A (en) Photographic objective
GB548253A (en) Improvements in or relating to photographic objectives
GB517386A (en) Improvements in or relating to optical objectives
GB550623A (en) Improvements in or relating to optical objectives
GB593835A (en) Improvements in or relating to optical objectives