DD201245A1 - Optical arrangement for automatic sharpening - Google Patents

Optical arrangement for automatic sharpening Download PDF

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Publication number
DD201245A1
DD201245A1 DD23412981A DD23412981A DD201245A1 DD 201245 A1 DD201245 A1 DD 201245A1 DD 23412981 A DD23412981 A DD 23412981A DD 23412981 A DD23412981 A DD 23412981A DD 201245 A1 DD201245 A1 DD 201245A1
Authority
DD
German Democratic Republic
Prior art keywords
transmitting
optical arrangement
concave mirror
receiving
optical
Prior art date
Application number
DD23412981A
Other languages
German (de)
Inventor
Rolf Jurenz
Michael Lenk
Original Assignee
Rolf Jurenz
Michael Lenk
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 Rolf Jurenz, Michael Lenk filed Critical Rolf Jurenz
Priority to DD23412981A priority Critical patent/DD201245A1/en
Publication of DD201245A1 publication Critical patent/DD201245A1/en

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B17/00Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08Catadioptric systems
    • G02B17/0896Catadioptric systems with variable magnification or multiple imaging planes, including multispectral systems
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481Constructional features, e.g. arrangements of optical elements
    • G01S7/4811Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
    • G01S7/4812Constructional features, e.g. arrangements of optical elements common to transmitter and receiver transmitted and received beams following a coaxial path
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B17/00Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08Catadioptric systems
    • G02B17/0804Catadioptric systems using two curved mirrors
    • G02B17/0808Catadioptric systems using two curved mirrors on-axis systems with at least one of the mirrors having a central aperture
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B17/00Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08Catadioptric systems
    • G02B17/0856Catadioptric systems comprising a refractive element with a reflective surface, the reflection taking place inside the element, e.g. Mangin mirrors
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B17/00Systems with reflecting surfaces, with or without refracting elements
    • G02B17/08Catadioptric systems
    • G02B17/0884Catadioptric systems having a pupil corrector
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28Systems for automatic generation of focusing signals
    • G02B7/30Systems for automatic generation of focusing signals using parallactic triangle with a base line
    • G02B7/32Systems for automatic generation of focusing signals using parallactic triangle with a base line using active means, e.g. light emitter

Abstract

The invention relates to an optical arrangement for the automatic focusing of photographic cameras and lenses, which preferably operates with an IR transmitting and receiving device. With the aim of reducing the cost of optical and optoelectronic components, the invention has a space-saving, combined IR transmitting and receiving device for automatic focusing to the task. The object is achieved in accordance with the invention by aligning in the optical axis one after another a transmitting diode and a small concave mirror as transmitting optics and the mirrored rear side of the concave mirror and a larger concave mirror with a central free opening as the receiving optic with associated receiver. The transmitting and receiving optics are arranged displaceably, their optically effective surfaces are different from each other sparse or aspherically wedged. Before the transmitter diode, a cover plate which can also be embodied as a lens is provided. Fig. 1

Description

234129 6

PENTACON DRESDEN

in Dresden, September 21, 1931.

Title of the invention

Optical arrangement for automatic focusing

Field of application of the invention

The invention relates to an optical arrangement zui automatic focusing, preferably for photographic cameras, which work with an IR transmitting and receiving device.

Characteristic of the known technical solutions

In photographic cameras, it is known to use the rays emitted by an infrared emitter located at the camera to measure the distance of the object. The distance from the part of the radiation reflected at the object is determined and after this the automatic focusing of the taking lens is carried out. The radiation is focused so that it can be directed to certain parts of the captured by the camera image field. The disadvantage here is (DE-OS'1 965 O64) the great expense of optical components, since two separate systems used for the transmitting and receiving device v / earth, namely two optically collecting members symmetrical to the IR emitter. In addition, further deflection means are necessary for generating the partial beams.

234129

It is also known (DE-AS 1 953 849) to arrange the IS emitter in the focal point of a reflector, so that pa-, ralleles light is emitted. Transmitting and receiving optics are here arranged separately on the optical axis one behind the other. In the middle of the receiving optics: an opening is available for receiving the transmitting optics. According to the focal length of the receiving optics, the overall system is very long. Furthermore, a distance setting is only for selected areas, that is. In stages, possible.

Another arrangement for automatic focusing (DE-AS 2,126,178) also requires a very large amount of optical and optoelectronic devices by the separate arrangement of transmitting and receiving device in the «way that no combination of components in cooperation.

Object of the invention

With the invention, the cost of optical and optoelectronic components for the automatic focusing of photographic cameras and lenses is to be reduced,

Explanation of the essence of the invention;

The invention has for its object to provide a space-saving, combined transmitting and receiving device for preferably IH radiation for automatic focusing to 5.

According to the invention, the object is achieved in that one of a arranged in its focus emitting diode illuminated small concave mirror as a component of the optical transmission additionally has a mirrored back, the same time with a larger, aligned in the optical axis concave mirror a mirror objective

234 129 6

forms as receiving optics. According to one embodiment of the invention, the optically active surfaces of the components of the transmitting and receiving optics have mutually different spherical or aspherical curvatures. Conveniently, the larger concave mirror in the middle has a free opening, which is also designed as a fit for the receiver. Furthermore, the invention proposes that a cover plate is provided before the transmitter diode, which is also executable as a lens. This lens in front of the transmitting and receiving optics is advantageously designed so that it has different curvatures for the corresponding beam path. To carry out the automatic focusing, it is necessary that either the transmitting optics or the concave mirror of the receiving optics in the longitudinal direction displaceable and with the distance division of the taking lens can be coupled. Therefore, the transmission and Smpfangsoptik are preferably arranged in the fit housing of the taking lens or in the camera body. As the material for the Spisgelgrundkörper glass, ceramic, plastic and / or metal materials can be used. It is also provided that the mirror surfaces are designed as Yorder and / or rear surface mirrors.

Embodiment:

The invention will be explained in more detail below. In the accompanying drawing Pig. 1a shows the side view of the transmitting and

and receiving device with IR emitter

Pig. 1b, c Variants of the lens to be arranged in front of the IR transmitting and receiving device

Pig. 2 the IR transmitting and receiving device with displaceable concave mirror of the receiving optics FIG. 3 the IR transmitting and receiving optics with displaceable transmitting optics.

234129 6

In already known measuring principles of automatic focusing, it is necessary to send modulated IR radiation to the object to be sharpened. Thus, in the method by phase measurement, an IR transmitter diode is modulated with a specific frequency. The energy is projected onto the object via transmission optics and the reflected radiation is imaged by a receiving optics on the IR receiving diode. The phase difference between the alternating energy radiated by the transmitting diode and the energy recovered by the receiving diode serves as a signal for focusing. The sharpness outside measurement for the automatic focus optical. Systems is characterized in that the taking lens is not part of the measuring principle. Therefore, the proposed optical system is particularly suitable for the method of phase measurement, because here a fixed optical arrangement independent of the object distance is sufficient and only approximate focusing conditions must be observed when projecting onto the object and imaging the radiation reflected by the object. If, however, position-sensitive receivers are used in the method, a coupling of the transmitting or receiving optics with the taking lens is necessary to realize the sharpening conditions required in this case.

According to Pig. 1a, an IR transmitting diode 1 is arranged at the focal point of a small hollow level 2. Pluchtend in the optical axis is located behind the small concave mirror 2, a larger concave mirror 3 with a free opening 4, through which a behind-lying IR receiver can be acted upon with a luminous flux. Before the IR transmitting and receiving system including transmitting diode 1, a cover plate 6a is arranged in the .sich z. B. the fit of the transmitter diode 1 is located. This cover plate 6a can also be designed as a lens 6b (Pig. 1b). It is possible that the optical effect of the lens 6c corresponding to Pig. 1c in the transmission and reception area

5 234129 6

different, is. As a result, if necessary, a more favorable optimization of the concave mirrors 2, 3 can be made possible. Thus, e.g. to keep the mirror diameter in smaller dimensions.

The luminous flux emitted by the emitting diode 1 is preferably directed onto an object as a parallel light beam. The beam cross section limits the measurement. The portion of the beam reflected by the object passes through the spherical and / or aspherical surfaces of the concave mirrors 3 "and 2, which together represent a mirror objective, through the free opening 4 on the IR receiver 5> which is arranged in" fix-focus "setting It is also possible to transmit the luminous flux of the transmitter to a fixed distance as a convergent bundle and to set the receiving optics at the same distance : The : phase difference between transmitted and received signal of the modulated IH radiation, which is proportional to the object distance , serves as a measuring criterion for focusing the shooting lens, not shown.

The described optical device can be housed next to the taking lens either directly in the housing of this lens or in the camera. With regard to the electrical signal processing, reference is made to the known prior art.

A variant of the IR transmitting and receiving device according to the invention is shown in FIG. 2. Here, the concave mirror 3 of the receiving optics is in its motion in opposite directions coupled to the taking lens and the device is thus e.g. for the already mentioned method with position sensitive receivers usable. In order to comply with certain correction conditions, rear surface mirrors with differently curved front and rear surfaces can be used. The variant of FIG. 3 allows a shift of

6 2 3 4 12 9

Transmitting optics 2 including transmitting diode 1 and is coupled in the same direction with the recording lens during their movement. The application is also in the under Pig. 2 mentioned methods possible. In addition, here is that the free opening 4 in the concave mirror 3 of Smpfangsoptik is also formed as a fitting part and can receive the receiver 5.

In the case of a fixed transmitting device, the concave mirror 3 carrying the receiver 5 can also be coupled counter to the receiving objective in its movement.

It is within the scope of the invention that the proposed device can be used not only in the infrared range but also for other radiation ranges. Moreover, the dual utilization of the optical components for both transmitting and receiving is of great benefit. Raising der'Einsparung of components only a minimum of space is required during installation. The inventive arrangement also works independently of the used recording lens.

Claims (8)

  1. invention claim
    1. Optical arrangement for automatic Sehaz'f once hurry for preferably photographic cameras, with a transmitting and receiving device, characterized in that one of a arranged in its focus transmitting diode (1) illuminated small concave mirror (2) as a component of the optical transmission additionally has mirrored back, which forms simultaneously with a larger, aligned in the optical axis concave mirror (3) sin mirror objective as a receiving optical system.
  2. 2. Optical arrangement according to item 1, characterized in that the optically active surfaces of the components of the transmitting and receiving optics (2, 3) have different spherical or aspherical curvatures from each other. , , ·. , ,
  3. 3. Optical arrangement according to item 2, characterized in that the concave mirror (3) in the middle of a free opening (4), which is also designed as a socket for the receiver (5).
  4. 4. Optical arrangement according to point 3 »marked. in that in front of the transmitter diode (1) a cover plate (6a) is provided, which can also be embodied as a lens (Sb, 6c).
  5. 5. Optical arrangement according to point 4 »characterized in that the curvatures of the lens (6c) in front of the transmitting and receiving optics (2, 3). Each are different.
  6. 6. Optical arrangement according to point 5> characterized in that the transmitting optics (2) or the concave mirror (3) of the receiving optics in the longitudinal direction displaceable and with the Ent focussing one division of Aufnahmeob.jektivs is coupled.
    234129 6
  7. 7. Optical arrangement according to. Item 2, characterized in that the mirror base body made of glass, ceramic, plastic and / or 1 Maiallwerkstoffen and the mirror surfaces are designed as a front and / or rear surface mirrors.
  8. 8. An optical arrangement according to item 7, characterized in that the transmitting and receiving optics (2, 3) is arranged socket housing of Aufnahmeob.jeirtirs or in the camera body.
    (See 1. sheet drawings)
DD23412981A 1981-10-16 1981-10-16 Optical arrangement for automatic sharpening DD201245A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DD23412981A DD201245A1 (en) 1981-10-16 1981-10-16 Optical arrangement for automatic sharpening

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DD23412981A DD201245A1 (en) 1981-10-16 1981-10-16 Optical arrangement for automatic sharpening
GB08219994A GB2107897B (en) 1981-10-16 1982-07-09 Optical automatic critical focussing device
DE19823227980 DE3227980A1 (en) 1981-10-16 1982-07-27 Optical arrangement for automatic focusing

Publications (1)

Publication Number Publication Date
DD201245A1 true DD201245A1 (en) 1983-07-13

Family

ID=5534150

Family Applications (1)

Application Number Title Priority Date Filing Date
DD23412981A DD201245A1 (en) 1981-10-16 1981-10-16 Optical arrangement for automatic sharpening

Country Status (3)

Country Link
DD (1) DD201245A1 (en)
DE (1) DE3227980A1 (en)
GB (1) GB2107897B (en)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122835B (en) * 1982-06-30 1986-08-06 Eastman Kodak Co Rangefinder
DE102006031580A1 (en) 2006-07-03 2008-01-17 Faro Technologies, Inc., Lake Mary Method and device for the three-dimensional detection of a spatial area
US7573654B2 (en) * 2007-11-27 2009-08-11 Eastman Kodak Company Dual focal length lens system
DE102009010465B3 (en) 2009-02-13 2010-05-27 Faro Technologies, Inc., Lake Mary Laser scanner
DE102009015920B4 (en) 2009-03-25 2014-11-20 Faro Technologies, Inc. Device for optically scanning and measuring an environment
US9551575B2 (en) 2009-03-25 2017-01-24 Faro Technologies, Inc. Laser scanner having a multi-color light source and real-time color receiver
DE102009035337A1 (en) 2009-07-22 2011-01-27 Faro Technologies, Inc., Lake Mary Method for optically scanning and measuring an object
DE102009035336B3 (en) 2009-07-22 2010-11-18 Faro Technologies, Inc., Lake Mary Device for optical scanning and measuring of environment, has optical measuring device for collection of ways as ensemble between different centers returning from laser scanner
US9113023B2 (en) 2009-11-20 2015-08-18 Faro Technologies, Inc. Three-dimensional scanner with spectroscopic energy detector
DE102009055989B4 (en) 2009-11-20 2017-02-16 Faro Technologies, Inc. Device for optically scanning and measuring an environment
US9210288B2 (en) 2009-11-20 2015-12-08 Faro Technologies, Inc. Three-dimensional scanner with dichroic beam splitters to capture a variety of signals
DE102009057101A1 (en) 2009-11-20 2011-05-26 Faro Technologies, Inc., Lake Mary Device for optically scanning and measuring an environment
DE102009055988B3 (en) 2009-11-20 2011-03-17 Faro Technologies, Inc., Lake Mary Device, particularly laser scanner, for optical scanning and measuring surrounding area, has light transmitter that transmits transmission light ray by rotor mirror
US9529083B2 (en) 2009-11-20 2016-12-27 Faro Technologies, Inc. Three-dimensional scanner with enhanced spectroscopic energy detector
US9879976B2 (en) 2010-01-20 2018-01-30 Faro Technologies, Inc. Articulated arm coordinate measurement machine that uses a 2D camera to determine 3D coordinates of smoothly continuous edge features
GB2489650A (en) 2010-01-20 2012-10-03 Faro Tech Inc Embedded arm strain sensors
US9607239B2 (en) 2010-01-20 2017-03-28 Faro Technologies, Inc. Articulated arm coordinate measurement machine having a 2D camera and method of obtaining 3D representations
US9628775B2 (en) 2010-01-20 2017-04-18 Faro Technologies, Inc. Articulated arm coordinate measurement machine having a 2D camera and method of obtaining 3D representations
DE102010020925B4 (en) 2010-05-10 2014-02-27 Faro Technologies, Inc. Method for optically scanning and measuring an environment
DE102010032723B3 (en) 2010-07-26 2011-11-24 Faro Technologies, Inc. Device for optically scanning and measuring an environment
DE102010032726B3 (en) 2010-07-26 2011-11-24 Faro Technologies, Inc. Device for optically scanning and measuring an environment
DE102010032725B4 (en) 2010-07-26 2012-04-26 Faro Technologies, Inc. Device for optically scanning and measuring an environment
DE102010033561B3 (en) 2010-07-29 2011-12-15 Faro Technologies, Inc. Device for optically scanning and measuring an environment
DE102012100609A1 (en) 2012-01-25 2013-07-25 Faro Technologies, Inc. Device for optically scanning and measuring an environment
DE102012107544B3 (en) 2012-08-17 2013-05-23 Faro Technologies, Inc. Optical scanning device i.e. laser scanner, for evaluating environment, has planetary gears driven by motor over vertical motor shaft and rotating measuring head relative to foot, where motor shaft is arranged coaxial to vertical axle
GB2521312B (en) 2012-09-06 2016-07-06 Faro Tech Inc Laser scanner with additional sensing device
WO2014043461A1 (en) 2012-09-14 2014-03-20 Faro Technologies, Inc. Laser scanner with dynamical adjustment of angular scan velocity
US10067231B2 (en) 2012-10-05 2018-09-04 Faro Technologies, Inc. Registration calculation of three-dimensional scanner data performed between scans based on measurements by two-dimensional scanner
US9513107B2 (en) 2012-10-05 2016-12-06 Faro Technologies, Inc. Registration calculation between three-dimensional (3D) scans based on two-dimensional (2D) scan data from a 3D scanner
DE102012109481A1 (en) 2012-10-05 2014-04-10 Faro Technologies, Inc. Device for optically scanning and measuring an environment
DE102015122844A1 (en) 2015-12-27 2017-06-29 Faro Technologies, Inc. 3D measuring device with battery pack

Also Published As

Publication number Publication date
GB2107897A (en) 1983-05-05
DE3227980A1 (en) 1983-05-05
GB2107897B (en) 1985-08-21

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