DE3228575A1 - Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp - Google Patents

Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp

Info

Publication number
DE3228575A1
DE3228575A1 DE19823228575 DE3228575A DE3228575A1 DE 3228575 A1 DE3228575 A1 DE 3228575A1 DE 19823228575 DE19823228575 DE 19823228575 DE 3228575 A DE3228575 A DE 3228575A DE 3228575 A1 DE3228575 A1 DE 3228575A1
Authority
DE
Germany
Prior art keywords
structural unit
reflector
ellipse
incandescent lamp
halogen incandescent
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.)
Granted
Application number
DE19823228575
Other languages
German (de)
Other versions
DE3228575C2 (en
Inventor
Peter Dipl.-Ing. 8045 Ismaning Rakitsch
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority to DE19823228575 priority Critical patent/DE3228575A1/en
Publication of DE3228575A1 publication Critical patent/DE3228575A1/en
Application granted granted Critical
Publication of DE3228575C2 publication Critical patent/DE3228575C2/de
Granted legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00Projectors or projection-type viewers; Accessories therefor
    • G03B21/14Details
    • G03B21/20Lamp housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • F21V7/04Optical design
    • F21V7/08Optical design with elliptical curvature

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Projection Apparatus (AREA)

Abstract

The reflection surface of the reflector of the structural unit has a curvature which conforms to the shape of the curved element of an ellipse in accordance with the equation <IMAGE> tilted through the angle 2 of -2.4 DEG . The luminaire of the halogen incandescent lamp of the structural unit is projected directly into the plane of the microfilm to be observed. Short bearing dimension. The collecting lens which is normally required because of a large bearing dimension is omitted. Structural unit for use as a light source in microfilm readers. <IMAGE>

Description

Baueinheit, bestehend aus Ellipsoidreflektor und Halo-Unit consisting of an ellipsoid reflector and halo

genglühlampe Die Erfindung betrifft eine Baueinheit, bestehend aus Ellipsoidreflektor und Halogenglühlampe, zur Verwendung als Lichtquelle bei Mikrofilmlesegeräten.Genglühlampe The invention relates to a unit consisting of Ellipsoid reflector and halogen incandescent lamp, for use as a light source in microfilm readers.

Die bekannten Baueinheiten dieser Art erfordern ein großes Auflagemaß, etwa 100-200 mm Abstand der Reflektorauflage vom Bildfenster und Niedervoltlampen mit 80-100 W Leistungsaufnahme. Um die Reflektorbaugröße dieser Baueinheiten in praktikablen Grenzen zu halten, ist eine Sammellinse in den Strahlengang gebracht. Die Sammellinse projiziert die Öffnung des Reflektors der Baueinheit in die Eintrittspupille des Abbildungsobjektives. In Bildfeldmitte herrscht maximale Beleuchtungsstärke. Die Mattscheibe erscheint ungleichmäßig ausgeleuchtet. Die spitze Indikatrix der Mattscheibe verstärkt diesen Eindruck.The known structural units of this type require a large flange focal length, About 100-200 mm distance between the reflector pad and the picture window and low-voltage lamps with 80-100 W power consumption. To get the reflector size of these units in To keep practicable limits, a converging lens is brought into the beam path. The converging lens projects the opening of the reflector of the assembly into the entrance pupil of the imaging lens. There is maximum illuminance in the center of the image field. The screen appears to be unevenly illuminated. The pointed indicatrix of the The screen reinforces this impression.

Aufgabe der Erfindung ist es, die Mattscheibe so zu beleuchten, daß diese dem Betrachter gleichmäßig erhellt erscheint. M.a.W. es ist dafür zu sorgen, daß das Beleuchtungsstärkemaximun nicht in Mattscheibenmitte zu liegen kommt.The object of the invention is to illuminate the ground glass so that this appears evenly illuminated to the viewer. M.a.W. it is to be ensured that the maximum illuminance does not come to lie in the center of the screen.

Die gestellte Aufgabe wird durch die im Kennzeichen des Anspruchs 1 genannten Merkmale gelöst.The task set is determined by the feature of the claim 1 mentioned features solved.

Mit der erfindungsgemäßen Baueinheit wird der Leuchtkörper der Halogenglühlampe der Baueinheit über deren Reflektor unmittelbar in die Ebene des zu betrachtenden Mikrofilms projiziert. Es genügt ein Auflagemaß von 35-45 mm (der genaue Wert ist empirisch zu ermitteln).With the structural unit according to the invention, the luminous element of the halogen incandescent lamp becomes the unit over their Reflector directly in the plane of the projected microfilm to be viewed. A flange focal length of 35-45 mm (the exact value is to be determined empirically).

Es kann eine Lampe mit niedrigerer Leistungsaufnahme (etwa 30 W) als bisher zum Einsatz kommen. Ein Lesegerät, das mit der erfindungsgemäßen Baueinheit bestückt ist, braucht keinen Lüfter mehr zu besitzen und kann auch für Batterie- bzw. Akku-Betrieb ausgelegt werden.It can use a lamp with lower power consumption (around 30 W) than have been used so far. A reader that with the assembly according to the invention is equipped, does not need to have a fan and can also be used for battery or battery operation.

Weitere Einzelheiten sind der nachfolgenden Beschreibung mit Zeichnungen zu entnehmen. Es zeigen Figur 1 eine Baueinheit bekannter Art (schematisch) Figur 2 die erfindungsgemäße Baueinheit (schematisch) Figur 3 eine graphische Darstellung der Reflexionsfläche In Figur 1 ist mit 1 die Baueinheit, mit 2 deren Halogenglühlampe und mit 3 deren Reflektor bezeichnet. Bezugsziffer 4 kennzeichnet die wegen des großen Auflagemaßes von 100-200 mm erforderliche Sammellinse. In den Strahlengang kann ein Wärmeschutzfilter 5 geschaltet sein. Durchstrahlt wird ein Mikrofilm 6 vor Eintritt des Strahlenbündels in ein Objektiv 7.Further details can be found in the following description with drawings refer to. FIG. 1 shows a structural unit of a known type (schematic) FIG 2 shows the structural unit according to the invention (schematically); FIG. 3 shows a graphic representation the reflective surface In Figure 1, 1 is the unit, 2 is its halogen lamp and with 3 denotes the reflector. Reference number 4 denotes the because of the large back focus of 100-200 mm required converging lens. In the beam path a heat protection filter 5 can be connected. A microfilm 6 is irradiated before the beam enters an objective 7.

Das Auflagemaß der erfindungsgemäßen Baueinheit 10 ist demgegenüber wesentlich verkürzt. Es beträgt nur etwa 35-45 mm und die Sammellinse 4 ist entfallen. Die Halogenglühlampe 20 ist niedriger in der Leistungsaufnahme.The support dimension of the structural unit 10 according to the invention is in contrast significantly shortened. It is only about 35-45 mm and the converging lens 4 has been omitted. The halogen incandescent lamp 20 has a lower power consumption.

Sie beträgt etwa 30 W (Fig. 2).It is about 30 W (Fig. 2).

Die Krümmung der Reflexionsfläche des rotationssymmetrischen Ellipsoidreflektors 30 entspricht einem Kurvenstück einer Ellipse, das in einem Bereich verläuft, den Ellipsengleichungen A: (X'+(H*+0,7))² + (Y'-(-0,72+0,7))² = 1 und (43+0,7)² (24,75+0,7)² 2 2 (x-(H*-0,7)) + (Y'-(-0,72-O,7)) B t s mlt 43-0,7) 2 2 Koordinatenursprung in Bildfeldmitte und mit -14,5 c H* c -24,5 aufspannen in einem Koordinatensystem, dessen Achsen X', Y' einen Winkel α von -2,4° + 0,5° mit den Achsen X und Y eines Koordinatensystems einschließen, dessen X-Achse mit der Achse der Halogenglühlampe 20 der Baueinheit 10 zusammenfällt. H* definiert die Mittelpunktslage der Ellipsen.The curvature of the reflective surface of the rotationally symmetrical ellipsoidal reflector 30 corresponds to a curve piece of an ellipse that runs in an area the Ellipse equations A: (X '+ (H * + 0.7)) ² + (Y' - (- 0.72 + 0.7)) ² = 1 and (43 + 0.7) ² (24.75+ 0.7) ² 2 2 (x- (H * -0.7)) + (Y '- (- 0.72-O, 7)) B t s mlt 43-0.7) 2 2 Origin of coordinates in Spanning the center of the image field with -14.5 c H * c -24.5 in a coordinate system, whose axes X ', Y' make an angle α of -2.4 ° + 0.5 ° with the axes X and Y include a coordinate system whose X-axis coincides with the axis of the halogen lamp 20 of the structural unit 10 coincides. H * defines the center position of the ellipses.

H* kann wegen im Einzelfall notwendiger Anpassung an das optische Gesamtsystem von -14,5 bis -24,5 variieren.H * can be adapted to the optical in individual cases Overall system vary from -14.5 to -24.5.

Vorzugsweise entspricht die Krümmung der Reflexionsfläche des Ellipsoidreflektors 30 dem Verlauf eines Kurvenstückes a (Fig. 3) einer Ellipse E nach der Ellipsengleichung (X-H*)² + (Y+0,72)² 2 24,75= 43² 24,75² gekippt um den Winkel α von -2,4°.The curvature preferably corresponds to the reflection surface of the ellipsoidal reflector 30 the course of a curve piece a (Fig. 3) of an ellipse E according to the ellipse equation (X-H *) ² + (Y + 0.72) ² 2 24.75 = 43² 24.75² tilted by the angle α of -2.4 °.

Der kaltverspiegelte Reflektor 30 kann preßtechnisch ausgeführt und mit Kegelstufen versehen sein, um örtliche Schwankungen der Beleuchtungsstärke zu verhindern.The cold-mirrored reflector 30 can be executed by pressing and be provided with conical steps to localize fluctuations in illuminance impede.

Den erzielbaren Verbesserungsgrad G1 an Gleichmäßigkeit der Mattscheibenausleuchtung gegenüber einer vergleichbaren Baueinheit bekannter Art zeigt nachfolgende Tabelle. Während sich bei Anwendung einer bekannten Baueinheit G1 auf 38 % bzw. 75 % beläuft, beträgt G1 bei Anwendung einer erfindungsgemäßen Baueinheit 80 % bzw. 84 %.The achievable degree of improvement G1 in the uniformity of the focusing screen illumination compared to a comparable structural unit of known type shows the following Tabel. While using a known structural unit G1 amounts to 38% or 75%, G1 is 80% or 84% when using a structural unit according to the invention.

Tabelle Lampen 19,8 v 13,8 v Meß- 30 w 85 w auf - 500 h 1000 h Maske: 7x5,65 mm2 m N=43 lm ON=31 lm Obj. : 2,8/8,3 Gel=80 8/G Gel=38 % Maske: 11,2x7,4mm2=8j lm O N=104 lm Obj.: 2,8/28,5- G1=84 % Gel=75 % Tabel Lamps 19.8v 13.8v Measuring 30 w 85 w open - 500 h 1000 h Mask: 7x5.65 mm2 m N = 43 lm ON = 31 lm Obj.: 2.8 / 8.3 gel = 80 8 / G gel = 38% Mask: 11.2x7.4mm2 = 8j lm ON = 104 lm Obj .: 2.8 / 28.5- G1 = 84% gel = 75%

Claims (2)

Patentansprüche 1. Baueinheit, bestehend aus rotationssymmetrischem Ellipsoidreflektor und Halogenglühlampe, zur Verwendung als Lichtquelle bei Mikrofilmlesegeräten, dadurch gekennzeichnet, daß die Reflexionsfläche des rotationssymmetrischen Ellipsoidreflektors (30) eine Krümmung aufweist, die dem Verlauf eines Kurvenstückes einer Ellipse in einem Bereich entspricht, den Ellipsengleichungen . (X-(H*+0 7))2 (Y'-(-0,72+0,7)) 2 + ~ 1 und (43+0,7) (24,75+0,7) (Y'-(H*-0,7))² -0,7)) = 2 B: * + 2 = 1 mlt (43~os7)2 (24,75-0,7) Koordinatenursprung in Bildfeldmitte und mit -14,5# H* #-24,5 aufspannen in einem Koordinatensystem, dessen Achsen X2, 1 einen Winkel α von -2,4°+0,5° mit den Achsen X und Y eines Koordinatensystems einschließen, dessen X-Achse mit der Achse der Halogenglühlampe (20) der Baueinheit (10) zusammenfällt.Claims 1. Assembly consisting of a rotationally symmetrical Ellipsoid reflector and halogen lamp, for use as a light source in microfilm readers, characterized in that the reflection surface of the rotationally symmetrical ellipsoidal reflector (30) has a curvature that corresponds to the course of a curved section of an ellipse in corresponds to a range, the ellipse equations. (X- (H * + 0 7)) 2 (Y '- (- 0.72 + 0.7)) 2 + ~ 1 and (43 + 0.7) (24.75 + 0.7) (Y '- (H * -0.7)) ² -0.7)) = 2 B: * + 2 = 1 mlt (43 ~ os7) 2 (24.75-0.7) Origin of coordinates in the center of the image field and span with -14.5 # H * # -24.5 in a coordinate system whose axes X2, 1 have an angle α of -2.4 ° + 0.5 ° with the axes X and Y of a coordinate system, the X-axis with the axis of the halogen lamp (20) of the structural unit (10) coincides. 2. Baueinheit nach Anspruch 1, dadurch gekennzeichnet, daß die Krümmung der Reflexionsfläche dem Verlauf des Kurvenstückes (a) gehorcht, das Teil der Ellipse E nach Gleichung (X-H*)² (Y+0,72)² = 1 ist, 43² = 24,75² 24,75 gekippt um den Winkel α von -2,40.2. Assembly according to claim 1, characterized in that the curvature the reflection surface obeys the course of the curve piece (a), which is part of the ellipse E according to equation (X-H *) ² (Y + 0.72) ² = 1, 43² = 24.75² 24.75 tilted by the angle α of -2.40.
DE19823228575 1982-07-30 1982-07-30 Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp Granted DE3228575A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823228575 DE3228575A1 (en) 1982-07-30 1982-07-30 Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823228575 DE3228575A1 (en) 1982-07-30 1982-07-30 Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp

Publications (2)

Publication Number Publication Date
DE3228575A1 true DE3228575A1 (en) 1984-02-02
DE3228575C2 DE3228575C2 (en) 1993-04-15

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Application Number Title Priority Date Filing Date
DE19823228575 Granted DE3228575A1 (en) 1982-07-30 1982-07-30 Structural unit consisting of an ellipsoid reflector and a halogen incandescent lamp

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000685A1 (en) * 1984-07-16 1986-01-30 Hughes Aircraft Company Illumination system reflector

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061763A1 (en) * 1969-12-17 1971-06-24 Thorn Lighting Ltd , Thorn House, London Slide projector
US4066887A (en) * 1976-10-27 1978-01-03 Maurice Levis Segmented sectional reflection for the projection of light beams and its method of production

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2061763A1 (en) * 1969-12-17 1971-06-24 Thorn Lighting Ltd , Thorn House, London Slide projector
US4066887A (en) * 1976-10-27 1978-01-03 Maurice Levis Segmented sectional reflection for the projection of light beams and its method of production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986000685A1 (en) * 1984-07-16 1986-01-30 Hughes Aircraft Company Illumination system reflector
AU569404B2 (en) * 1984-07-16 1988-01-28 Hughes Aircraft Company Illumination system reflector

Also Published As

Publication number Publication date
DE3228575C2 (en) 1993-04-15

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8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: F21V 7/08

D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee