EP0828111A1 - Système de formation d'image à focale variable pour un projecteur de plateau - Google Patents

Système de formation d'image à focale variable pour un projecteur de plateau Download PDF

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Publication number
EP0828111A1
EP0828111A1 EP97114158A EP97114158A EP0828111A1 EP 0828111 A1 EP0828111 A1 EP 0828111A1 EP 97114158 A EP97114158 A EP 97114158A EP 97114158 A EP97114158 A EP 97114158A EP 0828111 A1 EP0828111 A1 EP 0828111A1
Authority
EP
European Patent Office
Prior art keywords
lens
imaging system
lens element
lenses
lens member
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.)
Withdrawn
Application number
EP97114158A
Other languages
German (de)
English (en)
Inventor
Josef Dipl.-Ing Altmann
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.)
ALTMANN JOSEF DIPL ING INGENIE
Original Assignee
ALTMANN JOSEF DIPL ING INGENIE
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
Priority claimed from DE19643220A external-priority patent/DE19643220C1/de
Application filed by ALTMANN JOSEF DIPL ING INGENIE filed Critical ALTMANN JOSEF DIPL ING INGENIE
Publication of EP0828111A1 publication Critical patent/EP0828111A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/10—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures of iris type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/406—Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Definitions

  • the invention relates to an imaging system changeable focal length for a headlight Stage / studio technology comprehensively a first, one Illuminated lens member facing and the Illumination location turned away, a light-generating Element facing second lens member, the first and the second lens member displaceable against each other are, as well as one between a condenser system and the second lens element in the beam path arranged combination of an iris, one Panel slider set and a gobo slot (Operating part).
  • the gobo slot serves to introduce effect screens in the beam path.
  • Headlights are used for lighting, whose light cone depends on the setting at the lighting location have a different size can.
  • the so-called scattering angle, as in DIN 5037 sheet 1, 2.3.1 is defined in one the largest possible area to be changeable.
  • the invention is therefore based on the object Imaging system with variable focal length for one Spotlights of stage / studio technology of the generic type Kind in such a way that a possible large variation of the scattering angle range with optimal Imaging performance is enabled.
  • the refractive power ratio depends on the Shape and luminance of the light-generating Element of the headlight selected.
  • both lens elements can be one or include multiple lenses with spherical surfaces.
  • first and / or the second lens element one or include multiple lenses with aspherical surfaces.
  • first and / or the second lens member Combinations of one or more lenses with include spherical and aspherical surfaces.
  • first and / or the second lens member one of Center point changing towards the edge, for example decreasing or increasing refractive index.
  • the first lens member one or more consists lenses whose shape deviates from the circular shape and e.g. a rectangular, square or one other non-circular shape.
  • the two Lens elements are displaceable against each other in such a way that they are very tight in the maximum shifted state, are arranged adjacent to each other.
  • This will a very large one with an optimal imaging performance Scatter angle variation range that is defined as that Ratio of maximum spread angle to minimum Scattering angle, possible.
  • Such a scattering angle variation range in particular in the case of the imaging systems known from the prior art have not yet been achieved.
  • the imaging systems according to the invention are scattering angle variation ranges of 1: 3 and more to reach under Maintaining relatively good imaging properties of the imaging system. This will result in aberrations minimized.
  • the lenses can different technical or optical glasses exhibit.
  • the lens members can be in a variety of ways and way, for example manually, shifted against each other will.
  • An advantageous embodiment of the Invention provides that the two lens members of a motor controlled by a control circuit are mutually displaceable.
  • the iris diaphragm is advantageously also one open and open motor controlled by a control circuit closable.
  • a headlight includes for stage / studio technology e.g. Daylight gas discharge lamp 10, for example a xenon short-arc lamp, or a halogen light bulb, with a concave mirror 11 for focusing light, a condenser with two condenser lenses 21, 22 and one Imaging system 30 with a first, the illumination location facing lens member 31, a second, the Illumination location facing away and facing the lamp 10 second lens member 32, the first and the second lens members 31, 32 are displaceable in such a way that their distance can be changed, and an iris diaphragm 33. Furthermore, between the condenser system 20 and the iris diaphragm 33 is a set of iris that the Creation of different profile contours enables and a gobo slot that slides in different effect screens, be provided (not shown).
  • Daylight gas discharge lamp 10 for example a xenon short-arc lamp, or a halogen light bulb
  • a concave mirror 11 for focusing light
  • the second Lens member 32 has a refractive power that is larger or equal to twice and less than or equal to that Three times the refractive power of the first lens member 31 is.
  • the refractive power ratio depends on the luminance and the shape of the light-generating element, e.g. the arc of a gas discharge lamp or Filament of a light bulb, from.
  • a halogen incandescent lamp with 1.2 kW output is the refractive power ratio, which e.g. one Scattering angle variation range of 3: 1 enables at 2.3.
  • a halogen incandescent lamp with 2.5 kW which has a filament with greater luminance the refractive power ratio 2.5: 1 and with a halogen incandescent lamp
  • a refractive power ratio of 5 kW results of approx. 2.8: 1.
  • the lenses of the two lens members have a free diameter of approx. 150 mm up to approx. 250 mm.
  • the lens members 31, 32 are displaceable relative to one another in such a way that both lens elements in the maximum shifted state are arranged as close to each other as possible.
  • the approximate the two lens elements to approx. 2 to 5 mm.
  • the brightness cannot be fully controlled between the two lens elements in the tube of the imaging system the blackout device at a predetermined point 40, e.g. in the form of mechanical screens, such as B. Iris diaphragms or other versions of Orifices, arranged.
  • a predetermined point 40 e.g. in the form of mechanical screens, such as B. Iris diaphragms or other versions of Orifices.
  • darkening device 40 becomes the minimum approximation of the two lens elements limited.
  • An approximation of the two lens elements In this case, 31, 32 is only up to approx. 30 mm possible.
  • the iris diaphragm 33 is as tight as possible arranged adjacent to the second lens member 32.
  • the iris diaphragm 33 is the first to be imaged Element of the combination of panel slide set, gobo slide-in compartment and iris diaphragm. It’s so close how it is possible due to its structure, to the second lens member 32 arranged. Just through that Combination of these two features will result in low Imaging errors and therefore optimal imaging performance a wide range of scattering angles, i.e. a big Varying the scattering angle enables.
  • the two lens elements 31, 32 can for example one or more lenses with spherical surfaces or Lenses with aspherical surfaces or combinations from these.
  • the second lens member 32 can advantageously also one from the center to the edge of the Lens / lenses changing, for example have decreasing refractive power curve.
  • You can For example, so-called light glasses from Light Path Technologies, Inc., Albuquergue, NM, U.S.A. will.
  • the lenses of the lens limbs be rectangular or square.
  • This Training of the headlight tube and the lenses of the Lentils takes into account the fact that the Light sources in most cases either one elongated arc or a square or have rectangular filament. Because the light source shape in the blurred area of the first lens element appears in the headlight tube as a picture and certain edge areas of a circular lens would only have a low luminance, on the other hand, the cross section of the headlight tube should be kept as small as possible, it is advantageous a square or inscribe a rectangular lens element.
  • the two lens members 31, 32 can on the one hand manually moved against each other. But it is also possible that they shifted against each other by motor be, the motors from a control circuit can be controlled (not shown).
  • iris 33 from one open and open motor controlled by a control circuit be closable.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP97114158A 1996-08-23 1997-08-16 Système de formation d'image à focale variable pour un projecteur de plateau Withdrawn EP0828111A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19634127 1996-08-23
DE19634127 1996-08-23
DE19643220A DE19643220C1 (de) 1996-08-23 1996-10-19 Abbildungssystem mit veränderbarer Brennweite für einen Scheinwerfer der Bühnen-/Studiotechnik
DE19643220 1996-10-19

Publications (1)

Publication Number Publication Date
EP0828111A1 true EP0828111A1 (fr) 1998-03-11

Family

ID=26028677

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97114158A Withdrawn EP0828111A1 (fr) 1996-08-23 1997-08-16 Système de formation d'image à focale variable pour un projecteur de plateau

Country Status (1)

Country Link
EP (1) EP0828111A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1001210A1 (fr) 1998-11-02 2000-05-17 Altmann, Josef, Dipl.-Ing., Ingenieurbüro für Optik und Lichttechnik Système de projection d'images, à longeur focale modifiable pour les techniques d'éclairage sur scène ou en studio
EP1020681A3 (fr) * 1999-01-15 2001-10-10 Dedo Weigert Film GmbH Projecteur à angle d'émission de lumière variable à lentille antérieure asphérique
EP1158239A1 (fr) * 2000-05-22 2001-11-28 COEMAR S.p.A. Projecteur, notamment pour projecter des images à dimensions variables et de couleurs quelconques

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550500A1 (de) * 1975-11-11 1977-05-12 Bruno Dr Ing Weis Beleuchtungsscheinwerfer
US4462067A (en) * 1983-04-08 1984-07-24 Altman Stage Lighting Co., Inc. Spotlight and adjusting system
US4739456A (en) * 1986-12-12 1988-04-19 Little William D High intensity pattern/follow spot projector
US4823243A (en) * 1986-08-26 1989-04-18 Dedotec Optronische Und Mechanische Systeme Gmbh Miniature spotlight with extremely variable exit angle and constant even field of illumination

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550500A1 (de) * 1975-11-11 1977-05-12 Bruno Dr Ing Weis Beleuchtungsscheinwerfer
US4462067A (en) * 1983-04-08 1984-07-24 Altman Stage Lighting Co., Inc. Spotlight and adjusting system
US4823243A (en) * 1986-08-26 1989-04-18 Dedotec Optronische Und Mechanische Systeme Gmbh Miniature spotlight with extremely variable exit angle and constant even field of illumination
US4739456A (en) * 1986-12-12 1988-04-19 Little William D High intensity pattern/follow spot projector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1001210A1 (fr) 1998-11-02 2000-05-17 Altmann, Josef, Dipl.-Ing., Ingenieurbüro für Optik und Lichttechnik Système de projection d'images, à longeur focale modifiable pour les techniques d'éclairage sur scène ou en studio
EP1020681A3 (fr) * 1999-01-15 2001-10-10 Dedo Weigert Film GmbH Projecteur à angle d'émission de lumière variable à lentille antérieure asphérique
US6499862B1 (en) 1999-01-15 2002-12-31 Dedo Weigert Film Gmbh Spotlight with an adjustable angle of radiation and with an aspherical front lens
EP1158239A1 (fr) * 2000-05-22 2001-11-28 COEMAR S.p.A. Projecteur, notamment pour projecter des images à dimensions variables et de couleurs quelconques

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