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
• • 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
  • G03B2215/0539—Ringflash

Definitions

• the invention relates to external circular flash lamp, which is connectable to the camera, and intended to scatter the light from the flash lamp.
• Balotina glass granules By the light discharge of the flash lamp in the opening in the outer jacket, perpendicular to the approach axis, the irradiation of Balotina glass granules, which are used at the reflection layers takes place.
• the Balotina granules mutually influence each other by the light induction, so that it comes to uniform irradiation of the entire reflection surface. This often reflected and scattered radiation is directed by the arrangement of reflection layers parallel to the optical axis of the lens of the camera.
• the disadvantages of the described ring approach is that it has a very low efficiency, since the output light intensity due to the multiple reflection, the light refraction and scattering on individual Balotina granules extremely low, and therefore it would be necessary very strong flash lamps for ordinary photography, z , B. to use studio photography.
• the chromatic spectrum of the light source used changes, which is an undesirable effect.
• the use of the approach described is based on the so-called. Macro photography when shooting at small distances, as well as external, separate from the camera flash lamps that can be attached to the ring approach tangentially limited.
• the system can not be used for contemporary, mostly digital cameras, which have the external flash lamps arranged directly in the camera parallel to the lens, and therefore can not be tangentially placed on the ring approach.
• the system also does not eliminate the different dimensions of flashlamps.
• a similar solution from the ring approach for macro shooting is described in the published German patent application DE 10146158.
• the Acrylatringansatz is centered to the lens, the light from the built-in flash lamp occurs in it axially through the opening, which covers the flash tube of the built-in flash lamp, and reflected from the Soschiee Chemistry in the interior of the double hollow cylinder, where it again by means of reflective layers circularly emitted around the lens.
• the advantages of this solution are, in particular, that the ring approach can be placed on cameras with an attached external flash lamp, whose head is directed parallel to the lens of the camera, and in that the arrangement of Refiexions vom optimal light distribution in the approach interior and its transmission through the Diffuser with minimal losses allows, and therefore, the approach is applicable even with conventional Power of the flash lamp for photographing larger objects in the interior, as well as in the exterior.
• the object of the invention is to provide such a flash lamp, which would allow the radiation of enough intense, circular soft light not only for macro shots, but especially for amateur and professional photography of larger objects in the interior, as well as in the exterior, and on the Cameras as an external flashlamp directly attachable, would be without the use of additional power sources, which would integrate all the active elements in the uniform radiation would be, and would be suitable for the highest required performance.
• This object is achieved by the provision of circular flash lamp according to this invention.
• This flashlamp like the known external flashlamps, is formed in the shape of the double hollow cylinder made of the diffuser of translucent material, the outer sheath, the inner sheath and the rear wall of opaque material, advantageously on the inside with a reflective layer or surface provided, and arranged between the diffuser and the rear wall light source exists.
• the essence of the invention is that a supply lug is located in the top of the flashlamp, which contains an AC source of high voltage.
• the lug is provided with a support arm that terminates in the center portion of the flashlamp and terminated by a terminal socket for attachment to the camera.
• the light source consists of at least three high voltage flash tubes arranged symmetrically in a circle between the diffuser and the rear wall of the flash lamp.
• the high voltage source consists of the rectification battery cells, the converter, the transformer and the capacitor.
• At least one of the components which form the high-voltage source is arranged in the support arm. This arrangement allows optimal distribution of the components from the perspective of spatial arrangement, as well as the weight distribution, i. the focal point optimization of the circular flash lamp.
• the terminal base is dismounted turned to the support arm.
• the advantage of this arrangement is that, by the change from the terminal socket, the universal applicability of the circular flash lamp for various types of cameras, which are for different terminal base, is achieved.
• this flashlamp integrates all the active and steering elements, that it is compact, mobile, that it does not need additional external power sources, that its radiation is uniform, and that it is the highest required lighting performance is suitable.
• the support arm and the connection socket it is a universal external flash lamp on all Cameras, including cameras without built-in flash, easy to install, and it allows the development of the circular soft light both for macro shooting, and especially for amateur and professional photography of larger objects in the interior, as well as in the exterior.
• Fig. 1 shows the axonometric view of the circular flash lamp
• Fig. 2 shows the front view of the circular flash lamp without diffuser.
• the circular flashlamp 1 shown in FIGS. 1 and 2 is made of plastic.
• the double hollow cylinder consists of the outer shell 2, the inner shell 2L and the rear wall 3 of opaque material.
• the removable diffuser 4 is made of translucent material.
• the inner surfaces of the outer shell 2, the inner shell 2_ and of the rear wall 3 are provided with a glossy metal reflection layer.
• the light source 8 On the rear wall 3 is the light source 8, which consists of three high-voltage flash tubes, which are arranged in a circle each 120 °.
• the flash tubes are linked by means of the unillustrated conductors to the supply lug 5, which is connected to the rear wall 3 in the upper part of the flashlamp 1, and forms a whole with the support arm 6, which terminates in the center of the flashlamp ⁇ _, and is terminated by the terminal socket 7 for attachment to the camera.
• the supply approach 5, as well as the support arm 6 are also made of plastic.
• the supply approach 5 is the unillustrated converter, the transformer, the capacitor and the usual control electronics for controlling the flash length and intensity.
• In the support arm 6 are not shown rectification battery cells. The arrangement of these elements can basically be changed arbitrarily, with regard to the space and weight parameters.
• the circular flashlamp according to the invention operates so that the converter and the transformer change the rectifying current from the conventional battery cells to the alternating current of high voltage and higher frequency, through which the capacitor is then charged.
• the light source 8 Upon depression of the trigger from the camera, the light source 8 illuminates for the duration and in intensity determined by the control unit, and the process can be repeated.
• the terminal base 7 serves to fix the circular flashlamp ⁇ _ on the unillustrated camera, which is located approximately in the center of the flashlamp 1, and whose lens is so concentric with the radiation of the circular flashlamp 1.
• the terminal socket 7 contains contacts for linking with the camera control (shutter, light value, etc.). Since the cameras of different brands have different connection locks for connection socket 7, the connection socket 7 is dismantled, fixed by means of a prismatic assembly and a fuse to support arm 6. In such a manner, a plurality of terminal sockets 7 can be fixed to a support arm 6 corresponding to the various types and brands of cameras.
• the circular flashlamp according to the invention can be utilized as an external flashlamp which can be mounted on the camera, which is either not provided with a built-in flashlamp or its performance is insufficient for photographing in soft light

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Stroboscope Apparatuses (AREA)

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Citations (9)

• 2006
  • 2006-01-23 CZ CZ20060044A patent/CZ200644A3/cs unknown
• 2007
  • 2007-01-22 WO PCT/CZ2007/000004 patent/WO2007082497A1/de active Application Filing

Patent Citations (9)

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