DE373755C - Optical aid for sharp adjustment - Google Patents

Optical aid for sharp adjustment

Info

Publication number
DE373755C
DE373755C DESCH65898D DESC065898D DE373755C DE 373755 C DE373755 C DE 373755C DE SCH65898 D DESCH65898 D DE SCH65898D DE SC065898 D DESC065898 D DE SC065898D DE 373755 C DE373755 C DE 373755C
Authority
DE
Germany
Prior art keywords
optical aid
sharp adjustment
optical
plane
sharp
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
DESCH65898D
Other languages
German (de)
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
Publication date
Priority to DESCH65898D priority Critical patent/DE373755C/en
Application granted granted Critical
Publication of DE373755C publication Critical patent/DE373755C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

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

Description

Optisches Hilfsmittel zum scharfen Einstellen. Bei vielen optischen Instrumenten, wie Okularen für Fernrohre, Periskope usw., ist meistens immer noch ein mehr oder weniger großer Betrag von Bildwölbung vorhanden, so daß man das Gesichtsfeld nur bis zu einem gewissen Winkel verbreitern kann. Im anderen Falle muß man für Mitte und Rand verschieden scharf einstellen.Optical aid for sharp adjustment. With many optical Instruments, such as eyepieces for telescopes, periscopes, etc., is mostly still there there is a greater or lesser amount of curvature of the image, so that one can see the field of view can only widen to a certain angle. Otherwise you have to go for Set the center and edge differently in focus.

Werden aber für die seitlichen Strahlenkegel Planparallelplatten von passender Dicke L und der Brechzahl n zwischengeschaltet, so verlängert sich die Schnittweite um und man kann gleichzeitig Mitte und Rand scharf einstellen. Damit der Übergang nicht zu plötzlich erfolgt, kann man die Schnittweitenverlängerung auf mehrere Stufen s und damit Gesichtsfeldzonen verteilen. Der Stufenzylinder entsteht daher aus einer Anzahl aneinandergereihter Ringe y aus Planparallelglas mit verschiedenem Innendurchmesser (Abb. i).If, however, plane-parallel plates of suitable thickness L and the refractive index n are interposed for the lateral cones of rays, the back focal length is increased by and you can focus on the center and the edge at the same time. So that the transition does not take place too suddenly, the increase in back focal length can be distributed over several levels s and thus areas of the field of view. The stepped cylinder is therefore created from a number of rings y made of plane-parallel glass with different inside diameters (Fig. I).

Wenn die seitlichen Strahlenkegel stärker geneigt sind, so müssen die Ringflächen entsprechende Krümmungsradieny R erhalten (Abb. 2), oder es wird eine passende Linse a gemäß Abb. i vorgeschaltet, so daß die Strahlenkegel innerhalb des Stufensystems im wesentlichen parallel verlaufen.If the lateral cones of rays are more inclined, so must the ring surfaces receive corresponding radii of curvature R (Fig. 2), or it will a suitable lens a according to Fig. i preceded, so that the beam cone within of the step system run essentially parallel.

Claims (3)

PATENT-ANSPRÜcHE: i. Optisches Hilfsmittel zum scharfen Einstellen, gekennzeichnet durch einen aus ringförmigen Planparallelplatten von größer werdender freier Öffnung zusammengesetzten Hohlzylinder. PATENT CLAIMS: i. Optical aid for sharp adjustment, characterized by one of ring-shaped plane-parallel plates of increasing size free opening composite hollow cylinder. 2. Vorrichtung nach Anspruch i, dadurch gekennzeichnet, daß die Flächen der wie Planparallelplatten wirkenden Ringe gekrümmt sind. 2. Apparatus according to claim i, characterized characterized in that the surfaces of the rings acting like plane-parallel plates are curved are. 3. Vorrichtung nach Anspruch x, gekennzeichnet durch eine zwischen das optische Instrument und den Stufenzylinder geschaltete Linse, die so bemessen ist, daß die Strahlen innerhalb des Stufenzylinders im wesentlichen parallel verlaufen.3. Apparatus according to claim x, characterized by one between the optical Instrument and the stepped cylinder switched lens, which is dimensioned so that the Rays within the stepped cylinder are substantially parallel.
DESCH65898D Optical aid for sharp adjustment Expired DE373755C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DESCH65898D DE373755C (en) Optical aid for sharp adjustment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH65898D DE373755C (en) Optical aid for sharp adjustment

Publications (1)

Publication Number Publication Date
DE373755C true DE373755C (en) 1923-04-16

Family

ID=7438703

Family Applications (1)

Application Number Title Priority Date Filing Date
DESCH65898D Expired DE373755C (en) Optical aid for sharp adjustment

Country Status (1)

Country Link
DE (1) DE373755C (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429462A (en) * 1944-01-27 1947-10-21 Farnsworth Television & Radio Optical system for correction of tube wall distortion
US2546995A (en) * 1946-05-04 1951-04-03 Garutso Inc Condensing stereoscopic lens
US2546996A (en) * 1946-09-04 1951-04-03 Garutso Inc Deep focus lens
US2550685A (en) * 1945-10-25 1951-05-01 Garutso Inc Optical objective balance assembly
US2591535A (en) * 1946-08-28 1952-04-01 Balanscope Inc Balanced optical objective and focusing lens assembly
US2651237A (en) * 1946-08-01 1953-09-08 Balanscope Inc Balanced focus lens system
US2651238A (en) * 1948-03-01 1953-09-08 Balanscope Inc Deep focus photographic objective
US2821108A (en) * 1953-02-06 1958-01-28 Taylor Taylor & Hobson Ltd Deep-field optical objectives
US2952180A (en) * 1958-06-02 1960-09-13 Eastman Kodak Co Visual optical instrument having a combined reticle and field flattening element
DE1422132B1 (en) * 1960-06-29 1970-07-30 Eastman Kodak Co Correction member for correcting the curvature of field of an optical system
US4810071A (en) * 1986-02-27 1989-03-07 Olympus Optical Co., Ltd. Variable focal length lens system
US5486950A (en) * 1992-07-09 1996-01-23 Flat Antenna Company Limited Phase correcting zone plate

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429462A (en) * 1944-01-27 1947-10-21 Farnsworth Television & Radio Optical system for correction of tube wall distortion
US2550685A (en) * 1945-10-25 1951-05-01 Garutso Inc Optical objective balance assembly
US2546995A (en) * 1946-05-04 1951-04-03 Garutso Inc Condensing stereoscopic lens
US2651237A (en) * 1946-08-01 1953-09-08 Balanscope Inc Balanced focus lens system
US2591535A (en) * 1946-08-28 1952-04-01 Balanscope Inc Balanced optical objective and focusing lens assembly
US2546996A (en) * 1946-09-04 1951-04-03 Garutso Inc Deep focus lens
US2651238A (en) * 1948-03-01 1953-09-08 Balanscope Inc Deep focus photographic objective
US2821108A (en) * 1953-02-06 1958-01-28 Taylor Taylor & Hobson Ltd Deep-field optical objectives
US2952180A (en) * 1958-06-02 1960-09-13 Eastman Kodak Co Visual optical instrument having a combined reticle and field flattening element
DE1422132B1 (en) * 1960-06-29 1970-07-30 Eastman Kodak Co Correction member for correcting the curvature of field of an optical system
US4810071A (en) * 1986-02-27 1989-03-07 Olympus Optical Co., Ltd. Variable focal length lens system
US5486950A (en) * 1992-07-09 1996-01-23 Flat Antenna Company Limited Phase correcting zone plate

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