AT130928B - Lens for recording and projecting embossed films. - Google Patents

Lens for recording and projecting embossed films.

Info

Publication number
AT130928B
AT130928B AT130928DA AT130928B AT 130928 B AT130928 B AT 130928B AT 130928D A AT130928D A AT 130928DA AT 130928 B AT130928 B AT 130928B
Authority
AT
Austria
Prior art keywords
lens
recording
sep
embossed films
projecting embossed
Prior art date
Application number
Other languages
German (de)
Original Assignee
Keller Dorian Colorfilm Corp
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 Keller Dorian Colorfilm Corp filed Critical Keller Dorian Colorfilm Corp
Application granted granted Critical
Publication of AT130928B publication Critical patent/AT130928B/en

Links

Landscapes

  • Manufacture Of Macromolecular Shaped Articles (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Objektiv zur Aufnahme und Projektion   gaufrierter   Filme. 
 EMI1.1 
 
 EMI1.2 
 

 <Desc/Clms Page number 2> 

 
 EMI2.1 
   K   bedeutet das Verhältnis der Eintrittspupille zur Brennweite des Aufnahmeobjektivs. 



   T ist der optische Abstand des selektiven   Farbenfiltefs   vom Film im Aufnahmeapparat. 



   Der Wert von F ist durch die Projektionsbedingungen in einem bestimmten Raum oder Saal festgelegt. 



   Der Wert von D ist durch die Gleichung 4 bestimmt. e und   (6   sind unter Erwägung bequemer baulicher Ausführung der Apparate und Objektive zu wählen bzw. hängen hievon ab. 



   Es bleiben also drei Gleichungen mit den drei Unbekannten f1, f2 und E. 



   In einem ganz besonderen Fall liefern diese Gleichungen die folgenden Werte : 
 EMI2.2 
 
<tb> 
<tb> F <SEP> = <SEP> 200 <SEP> mm <SEP> E <SEP> = <SEP> 190 <SEP> nnn
<tb> fi <SEP> = <SEP> 300mm <SEP> a <SEP> -= <SEP> 27 <SEP> Mm
<tb> f2 <SEP> = <SEP> 220 <SEP> mm <SEP> e <SEP> = <SEP> 73 <SEP> mm
<tb> 
 Dieses Beispiel entspricht dem Fall, dass man einen kollimatierten Film und ein Aufnahmeobjektiv 
 EMI2.3 




   <Desc / Clms Page number 1>
 



  Lens for recording and projecting embossed films.
 EMI1.1
 
 EMI1.2
 

 <Desc / Clms Page number 2>

 
 EMI2.1
   K means the ratio of the entrance pupil to the focal length of the taking lens.



   T is the optical distance of the selective color filter from the film in the recording device.



   The value of F is determined by the projection conditions in a particular room or hall.



   The value of D is determined by Equation 4. e and (6 are to be selected with consideration of the convenient structural design of the apparatus and lenses, or depend on them.



   So there are three equations with the three unknowns f1, f2 and E.



   In a very special case, these equations give the following values:
 EMI2.2
 
<tb>
<tb> F <SEP> = <SEP> 200 <SEP> mm <SEP> E <SEP> = <SEP> 190 <SEP> nnn
<tb> fi <SEP> = <SEP> 300mm <SEP> a <SEP> - = <SEP> 27 <SEP> Mm
<tb> f2 <SEP> = <SEP> 220 <SEP> mm <SEP> e <SEP> = <SEP> 73 <SEP> mm
<tb>
 This example corresponds to the case that you have a collimated film and a taking lens
 EMI2.3


 

Claims (1)

PATENT-ANSPRUCH : Objektiv zur Aufnahme und Projektion gaufrierter Filme, dadurch gekennzeichnet, dass die wirksame Blende, die mit der Austrittspupille zusammenfällt, sich vor dem Objektiv in geringer Entfernung vom optischen System oder in unmittelbarem Kontakt mit letzterem befindet und eine Öffnung besitzt, lie jener des leuchtenden Büschel, das von einem Linsenelement des gaufrierten Films ausgeht, entspricht, wobei das selektive Farbenfilter mit der Blende zusammenfällt und, von der Seite des Films aus gesehen, bei der Projektion durch das optische System in dieselbe Entfernung zurückverlegt wird wie bei der Aufnahme. EMI2.4 PATENT CLAIM: Lens for recording and projecting embossed films, characterized in that the effective diaphragm, which coincides with the exit pupil, is located in front of the lens at a short distance from the optical system or in direct contact with the latter and has an opening that allows that of the luminous cluster, emanating from a lens element of the embossed film, the selective color filter coinciding with the diaphragm and, as seen from the side of the film, being moved back by the optical system during projection to the same distance as during recording. EMI2.4
AT130928D 1928-03-21 1929-03-19 Lens for recording and projecting embossed films. AT130928B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR130928X 1928-03-21

Publications (1)

Publication Number Publication Date
AT130928B true AT130928B (en) 1932-12-27

Family

ID=8873866

Family Applications (1)

Application Number Title Priority Date Filing Date
AT130928D AT130928B (en) 1928-03-21 1929-03-19 Lens for recording and projecting embossed films.

Country Status (1)

Country Link
AT (1) AT130928B (en)

Similar Documents

Publication Publication Date Title
AT130928B (en) Lens for recording and projecting embossed films.
DE629024C (en) Photographic camera with setting viewfinder
AT123473B (en) Device for automatic train end signaling.
GB1321121A (en) Photographic camera having a photochromic light modulating device
AT137127B (en) Method and device for recording audio film.
AT103802B (en) Lens with anastigmatic field flattening.
DE390975C (en) Procedure for testing photographic negatives
AT167601B (en) Contrast photometer with constant reference light source
DE387670C (en) Lens hood for stereo cameras
AT260570B (en) Optical system with continuously variable focal length for photographic or cinematographic devices
DE415430C (en) Recording cinematograph with built-in viewfinder
AT138134B (en) Device for the reproduction and enlargement of opaque photographic negatives or images illuminated in incident light.
DE426214C (en) Standard for photographic cameras
AT88131B (en) Device to protect light-sensitive selenium cells against excessive exposure.
DE616158C (en) Device for determining exposure time through viewfinder and aperture on photographic apparatus
AT116184B (en) Device for the simultaneous elimination of the moiré effect and the chromatic diffraction aberrations in the reproduction of colored films with periodic networks.
DE449104C (en) Reflex camera
DE364492C (en) Process for the production of small-scale photographs
DE411484C (en) Method for producing bright field lighting in the presence of dark field lighting
AT224430B (en) Single-lens reflex camera with exchangeable viewfinder insert and measuring mechanism display visible in the viewfinder
DE696244C (en) Light meter
AT121676B (en) Device for the projection of transparent or opaque objects and for the enlargement or reduction of photographic recordings when using direct or reflected light.
AT101227B (en) Film viewing device.
AT92413B (en) Collapsible travel dark room.
DE853096C (en) Viewfinder for cinema recorders