DE2840922C3 - Electronic flash unit - Google Patents
Electronic flash unitInfo
- Publication number
- DE2840922C3 DE2840922C3 DE19782840922 DE2840922A DE2840922C3 DE 2840922 C3 DE2840922 C3 DE 2840922C3 DE 19782840922 DE19782840922 DE 19782840922 DE 2840922 A DE2840922 A DE 2840922A DE 2840922 C3 DE2840922 C3 DE 2840922C3
- Authority
- DE
- Germany
- Prior art keywords
- reflector
- partial
- electronic flash
- partial reflectors
- reflectors
- 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
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS 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
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
- G03B2215/0514—Separate unit
- G03B2215/0517—Housing
- G03B2215/0525—Reflector
- G03B2215/0528—Reflector movable reflector, e.g. change of illumination angle or illumination direction
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stroboscope Apparatuses (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Description
alle drei Teilreflektoren nach vorn (Fig.2). Soll zu gleicher Zeit direkt und indirekt beleuchtet werden, werden die Teilreflektoren 6' und 6'" geschwenkt (Schwenkstellung siehe Fig. 1). 1st ausschließlich indirekte Beleuchtung gewünscht, wird auch Teilreflektor 6" mitgeschwenkt Ein die Arretierung des sonst nach vorne schauenden Teilreflektcis 6" lösender Hebel an der Geräterückseite ist hierzu zu betätigen.all three partial reflectors to the front (Fig. 2). Supposed to are illuminated directly and indirectly at the same time, the partial reflectors 6 'and 6' "are pivoted (For pivot position see Fig. 1). If only indirect lighting is required, a partial reflector is also required 6 "also swiveled to release the locking of the otherwise forward-looking partial reflector 6" To do this, actuate the lever on the rear of the device.
Die lichten Abmessungen des Reflektors des Gerätes in der Ebene seiner Austrittsöffnung betragen etwa 24,12 χ 54,2 mm. Der Halbwertswinkel seines Lichtbündels ist dabei horizontal 2a=65° und vertikal 2λ = 50°. Die Breite a des Teilreflektors 6" beträgt gleichbleibend etwa 10 mm. Die Breite b der Teüreflektoren 6', 6'" dagegen nimmt vom Reflektorscheitel zur Lichtaustrittsöffnung hin zu. Während die Breite b der beiden Teilreflektoren 6', 6'" im Reflektorscheitel etwa 15 mm beträgt sind es in der Ebene der Lichtaustrittsöffnung des Reflektors etwa 22 mm. Das Verhältnis der Breite a des Teilreflektors 6" zur Summe der Breiten b der Teilreflektoren 6', 6'" ist im Reflektorscheitel 1 : 3. Von der Lichtquelle 5 wird ein etwa 40 mm langer Abschnitt der von ihr erzeugten Leuchtsäule genutzt, wovon bei gleichzeitig direkter und indirekter Objektbeleuchtung für den indirekten Anteil etwa drei Vierte! herangezogen werden. Das Verhältnis der Breite a des Teilreflektors 6" zur Summe der Breiten b der Teilreflektoren 6', 6'" ist in der Ebene der Lichtaustrittsöffnung 1 :4,4. Die Krümmung der Reflexicnsflache der Teilreflektoren 6', 6", 6'" verläuft in einem von zwei Kurven A, B begrenzten Bereich R (schraffiert), für die giltThe clear dimensions of the reflector of the device in the plane of its outlet opening are approximately 24.12 χ 54.2 mm. The half-value angle of its light beam is horizontally 2a = 65 ° and vertically 2λ = 50 °. The width a of the partial reflector 6 ″ is constant about 10 mm. The width b of the partial reflectors 6 ′, 6 ″, on the other hand, increases from the reflector apex to the light exit opening. While the width b of the two partial reflectors 6 ', 6'"in the reflector apex is about 15 mm, it is about 22 mm in the plane of the light exit opening of the reflector. The ratio of the width a of the partial reflector 6" to the sum of the widths b of the partial reflectors 6 ' , 6 '" is 1: 3 in the reflector apex. An approximately 40 mm long section of the light column generated by it is used by the light source 5, of which approximately three fourths are used for the indirect portion with simultaneous direct and indirect object illumination Width a of the partial reflector 6 "to the sum of the widths b of the partial reflectors 6 ', 6'" is 1: 4.4 in the plane of the light exit opening. The curvature of the reflective surface of the partial reflectors 6 ', 6 ", 6'" runs in one of two curves A, B bounded area R (hatched) for which applies
A: >2 = ΐ3,4χ -0,3722 Jt-mit0<y<
12,3und
B: j'2=18x -0,5233 x2 mit 0<y<
11, A: > 2 = ΐ3.4χ -0.3722 Jt-with 0 <y <12.3 and
B: j'2 = 18x -0.5233 x 2 with 0 <y < 11,
dargestellt in kartesischer Koordinierung in F i g. 3.shown in Cartesian coordination in FIG. 3.
Bevorzugt setzt sich der Krümmungsverlauf der ίο Reflexionsfläche der Teilreflektoren dabei aus drei in diesem Bereich liegenden, aufeinanderfolgenden Kurvenabschnitten 1, II, III zusammen (ausgezogene Kurve), wobeiThe course of curvature of the reflection surface of the partial reflectors is preferably composed of three in Successive curve sections 1, II, III lying in this area together (solid curve), whereby
Abschnitt I mit 0 < y< 4 der Gleichung
y2= 15,4 χ-0,0675*2,Section I with 0 < y < 4 of the equation
y2 = 15.4 χ-0.0675 * 2,
Abschnitt II mit 4 <y< 9 der Gleichung
y2 = 14,6 χ -0,4148 x2 undSection II with 4 <y <9 of the equation
y 2 = 14.6 χ -0.4148 x 2 and
Abschnitt III mit 9 <y< 12,06 der Gleichung
y2=12,6x -0,2681 x2 Section III with 9 <y < 12.06 of the equation
y2 = 12.6x -0.2681 x 2
entspricht.is equivalent to.
Eine gewölbte, strahlungsdurchlässige Scheibe 4 schirmt den Lamper.-Reflektorraum gegen die Umgebung ab. Die Scheibe kann geriffelt sein. Ein angepaßter Fuß 8 dient zum elektrischen und mechanischen Verbinden mit einer Kamera.A curved, radiation-permeable pane 4 shields the lamp reflector space from the surroundings away. The disc can be corrugated. An adapted foot 8 is used for electrical and mechanical Connect to a camera.
Hierzu 3 Blatt ZeichnungenFor this purpose 3 sheets of drawings
Claims (5)
B: y2=18x - 0,5233 x2 mit 0<y< 11 A: y 2 = 13.4x - 0.3722 x * with 0 <y <12.3 and
B: y2 = 18x - 0.5233 x 2 with 0 <y <11
Abschnitt II mit 4 <y< 9 der GleichungJ * = 15.4 χ -0.0675 x 2 ,
Section II with 4 <y < 9 of the equation
Abschnitt III mit 9 <y< 12,06 der Gleichung y 2 = 14.6 χ -0.4148 x 2 and
Section III with 9 < y < 12.06 of the equation
gehorcht. y 2 = 12.6 χ -0.2681 x *
obey.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782840922 DE2840922C3 (en) | 1978-09-20 | 1978-09-20 | Electronic flash unit |
FR7916532A FR2431090A1 (en) | 1978-07-10 | 1979-06-27 | ELECTRONIC FLAT APPARATUS HAVING A REFLECTOR WITH ORIENTABLE ELEMENTS |
IT68422/79A IT1119019B (en) | 1978-07-10 | 1979-07-09 | ELECTRONIC FLASHER |
IT7953403U IT7953403V0 (en) | 1978-07-10 | 1979-07-09 | ELECTRONIC FLASHING LIGHT |
GB7923968A GB2026720B (en) | 1978-07-10 | 1979-07-10 | Electronic flash device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19782840922 DE2840922C3 (en) | 1978-09-20 | 1978-09-20 | Electronic flash unit |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2840922A1 DE2840922A1 (en) | 1980-04-03 |
DE2840922B2 DE2840922B2 (en) | 1980-12-18 |
DE2840922C3 true DE2840922C3 (en) | 1981-11-19 |
Family
ID=6049954
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19782840922 Expired DE2840922C3 (en) | 1978-07-10 | 1978-09-20 | Electronic flash unit |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2840922C3 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1866802U (en) * | 1962-12-06 | 1963-02-07 | Fritz Consten | TRANSPORTABLE LIGHTING DEVICE. |
US3237003A (en) * | 1962-08-29 | 1966-02-22 | Honeywell Inc | Photographic flash apparatus |
-
1978
- 1978-09-20 DE DE19782840922 patent/DE2840922C3/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3237003A (en) * | 1962-08-29 | 1966-02-22 | Honeywell Inc | Photographic flash apparatus |
DE1866802U (en) * | 1962-12-06 | 1963-02-07 | Fritz Consten | TRANSPORTABLE LIGHTING DEVICE. |
Also Published As
Publication number | Publication date |
---|---|
DE2840922B2 (en) | 1980-12-18 |
DE2840922A1 (en) | 1980-04-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAP | Request for examination filed | ||
OD | Request for examination | ||
C3 | Grant after two publication steps (3rd publication) | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: CULLMANN GMBH, 8506 LANGENZENN, DE |
|
8340 | Patent of addition ceased/non-payment of fee of main patent |