DE1806862U - REFLECTIVE MIRROR - EXPOSURE METER. - Google Patents

REFLECTIVE MIRROR - EXPOSURE METER.

Info

Publication number
DE1806862U
DE1806862U DEB39776U DEB0039776U DE1806862U DE 1806862 U DE1806862 U DE 1806862U DE B39776 U DEB39776 U DE B39776U DE B0039776 U DEB0039776 U DE B0039776U DE 1806862 U DE1806862 U DE 1806862U
Authority
DE
Germany
Prior art keywords
light
mirror
exposure meter
meter
sensitive element
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
DEB39776U
Other languages
German (de)
Inventor
Friedrich W Dr Med Binder
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
Priority to DEB39776U priority Critical patent/DE1806862U/en
Publication of DE1806862U publication Critical patent/DE1806862U/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/0271—Housings; Attachments or accessories for photometers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0414—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using plane or convex mirrors, parallel phase plates, or plane beam-splitters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0437—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using masks, aperture plates, spatial light modulators, spatial filters, e.g. reflective filters

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

B e s c h r e i b u n g. Bezeichnung der Erfindung : Reflexspiegei-Belichtungsmesser. Description. Name of the invention: Reflex mirror light meter.

Die Verwendung von eingebauten fotoelektrischen Belichtungsmessern in Spiegelreflexkameras hat bei allen Vorzügen noch folgende Nachteile : Das sichtfenster des Belichtungsmessers erhält in vielen Fällen andere Lichtmengen als das Objektiv. Dadurch kommt es immer wieder zu Fehlbelichtungen. The use of built-in photoelectric light meters SLR cameras have the following disadvantages despite all their advantages: The viewing window the exposure meter receives different amounts of light than the lens in many cases. This leads to incorrect exposures again and again.

Beim Auswechseln von Objektiven verändern sich die Lichtwerte des aufzunehmenden Bildausschnittes. When changing lenses, the light values of the change image section to be recorded.

Beim Vorsetzen von Filtern müssen jeweils die Filterfak- toren berücksichtigt werden. c Diese Nachteile können durch Verwendung des eingebauten fotoelektrischen Belichtungsmessers mit Lichtmessung am Reflexspiegel von Spiegelreflexkameras vermieden werden. Es handelt sich also um eine Lichtmessung direkt im Strahlengang des bei der Aufnahme auf den Film fallenden Lichtes. Dieser Vorgang wird durch 2 ebnode ermöglicht : a. Der Reflexspiegel ist mit einer teil-lichtdurchlässi- gen Reflexschicht belegt. Ein Teil des Lichtes gelangt also durch den Spiegel hindurch an das auf der Spiegelrückwand angebrachte lichtsensitive Element, oder b. Die Reflexschicht des Spiegels ist gitterförmig durchbrochen. Durch diese Lücken hindurch fällt ein Teil des ichtes auf die lichtsensitive Schicht.When installing filters, the filter factories must be goals are taken into account. c These disadvantages can be avoided by using the built-in photoelectric exposure meter with light measurement on the reflex mirror of single-lens reflex cameras. It is a matter of measuring the light directly in the beam path of the light falling on the film during the recording. This process is made possible by 2 ebnodes: a. The reflective mirror is equipped with a partially translucent covered with reflective layer. Part of the light therefore passes through the mirror to the light-sensitive element attached to the rear wall of the mirror, or b. The reflective layer of the mirror is perforated in the form of a grid. Part of the light falls through these gaps onto the light-sensitive layer.

Von hier aus wird der auf fotoelektrischem We, e erzcufte Strom auf den Anzeigemechanismus weitergeleitet. Das lichtsensitive Element wird also automatisch mit dem Reflexspiegel bewegt und jeweils beim Spannen des Verschlusses in den Strahlengang gebracht. From here the electricity generated by photoelectric means is drawn up forwarded to the display mechanism. The light-sensitive element thus becomes automatic moved with the reflective mirror and in each case when the shutter is tensioned in the beam path brought.

Die Zeichnung zeigt : Strahlengang des Lichtes L durch das Objektiv 0 und durch die Blende B. Teilreexion an dem Spiegel Sp mit photosensitiver Schicht Ph. Austritt des sichtes durch den Sucher Su. The drawing shows: Beam path of light L through the lens 0 and through the diaphragm B. partial rexion on the mirror Sp with photosensitive layer Ph. Exit of sight through the viewfinder Su.

Vorteile : Exakte Lichtmessung, die in jedem Falle ohne Beeinflussung durch zusätzliche Objektiv-oder Filterfaktoren ausschließlich das für den Film bestimmte Licht misst. Advantages: Exact light measurement, in any case without any influence through additional lens or filter factors only what is intended for the film Light measures.

Ausschaltung von Fehlern, entstanden durch verschiedene Lichteinfallswinkel auf das Fenster des Belichtungsmessers und auf das Objektiv.Elimination of errors caused by different angles of incidence of light on the exposure meter window and on the lens.

Das Prinzip der Lichtmessung am Reflexspiegel kann auch bei zweiäugigen Spiegelreflexkameras verwendet werden, jedoch kommen einige Vorteile (Berücksichtigung von Objektiv-und Filterfaktoren) in Wegfall. The principle of light measurement on the reflex mirror can also be used with two-eyed Single-lens reflex cameras are used, however, there are some advantages (consideration of lens and filter factors) in elimination.

Claims (1)

Reflexspiegel-Belichtungsmesser
Schutzansprüche : 1. Fotoelektrischer Belichtungsmesser dadurch gekennzeichnet, daß das lichtsensitive Element auf der Rückseite des Re- flexspiegels einer Spiegelreflexkamera befestigt ist. CD
2. Fotoelektrischer Belichtungsmesser dadurch gekennzeichnet, daß das lichtsensitive Element durch den Spiegel hindurch das zur Lichtmessung erforderliche Licht erhält, ermöglicht entweder durch Verwendung eines teil-lichtdurchlässigen Reflexbelages oder durch Verwendung eines gitterförlnig durchbrochenen Reflexbelages. Reflective mirror light meter
Protection claims: 1. Photoelectric light meter characterized in that that the light-sensitive element on the back of the flexspiegel is attached to a reflex camera. CD
2. Photoelectric exposure meter, characterized in that the light-sensitive element receives the light required for light measurement through the mirror, made possible either by using a partially translucent reflective coating or by using a latticed reflective coating. 3. Fotoelektrischer Belichtungsmesser dadurch gekennzeichnet, daß von dem mit dem Reflexspiegel beweglichen lichtsensitiven Element aus, durch eine die Bewegung des Spiegels nicht behindernden elektrischen Leitung, der Strom auf den Anzeigemechanismus des Belichtunbsmessers weitergeleitet wird.3. Photoelectric exposure meter, characterized in that from the light-sensitive element that can be moved with the reflex mirror, through a the movement of the mirror not obstructing electrical conduction, the electricity on the display mechanism of the exposure meter is forwarded.
DEB39776U 1959-12-29 1959-12-29 REFLECTIVE MIRROR - EXPOSURE METER. Expired DE1806862U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB39776U DE1806862U (en) 1959-12-29 1959-12-29 REFLECTIVE MIRROR - EXPOSURE METER.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB39776U DE1806862U (en) 1959-12-29 1959-12-29 REFLECTIVE MIRROR - EXPOSURE METER.

Publications (1)

Publication Number Publication Date
DE1806862U true DE1806862U (en) 1960-02-25

Family

ID=32914580

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB39776U Expired DE1806862U (en) 1959-12-29 1959-12-29 REFLECTIVE MIRROR - EXPOSURE METER.

Country Status (1)

Country Link
DE (1) DE1806862U (en)

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