Abstract:
The present disclosure relates to a support ring 1 for mounting of a soft box on a light source. The support ring 1 comprises attachment means 2 for attachment of the support ring 1 to the light source, at least one cavity 3 configured to receive support pins 4 of the soft box. The cavity 3 further comprises a first 5 and a second 6 support element arranged to counteract a torque from the support pins, when the support pins are in an inserted position in the cavity. At least one entry element 7 on a radial outside of the cavity 3 is arranged to counteract a force required to bend the support pin to an angle where the support pin can be inserted into the cavity 3.
Abstract:
The present disclosure relates to a flash generator for providing power supply to a flash tube so that the flash tube rapidly provides a light output adapted to FP-sync, Flat Peak. The flash generator comprises a capacitor bank, an output and a switch configured to switch a current flow from the capacitor bank via the output to provide a variable power via the output. The flash generator further comprises a controller for controlling the switch, whereby by controlling the on time of the switch, the generator is operative to provide,during a time period of 100 to 2000 µs during a peak time period within the time period,an average power at least 4 times higher than the average power provided during the other time period within the time period, whereby the flash tube during the peak time period becomes fully ignited.
Abstract:
The invention discloses a drive circuit and a method for controlling a drive circuit for a flash tube. The drive circuit comprises a capacitor and a first inductor switch group comprising a first inductor and at least one first switch connected in series with each other. The first inductor switch group is configured to be connected in series with the flash tube and the capacitor. The drive unit further comprises at least a second inductor switch group comprising a second inductor and at least one second switch connected in series with each other and configured to be connected in series with the flash tube and the capacitor, and in parallel with the first inductor switch group. The method further comprises the steps of receiving input parameters related to a desired flash characteristics, and controlling the first and second switches separately based on the received input parameters to obtain the desired flash characteristics.
Abstract:
The present invention generally relates to the field of communication between electronic devices used for photography.In particular, the invention relates to a method, transmission unit, system and computer program for wireless communication between a camera and at least one remote flash device, such as photoflash units and related equipment. More in particular, the invention provides a way of controlling a plurality of flash devices from an intermediate radio transmission unit mountable on the camera, and utilized a delay a sequence flash control sequence so as to synchronize the function of the camera and the remote flash devices during image acquisition.
Abstract:
The present invention relates to a generator for a flash device. The generator comprises at least a first capacitor bank comprising at least one capacitor of a first type. The first capacitor bank being connectable to a charger via a first switch. The first capacitor bank being further connected to an output via a first component which only allows current flow from the first capacitor bank to the output. The generator further comprises at least a second capacitor bank comprising at least one capacitor of a second type connectable to the charger via a second switch. The second capacitor bank being further connected to the output via a second component which only allows current flow from the second capacitor bank to the output. The generator is configured to individually control the first switch and the second switch so that the first capacitor bank and the second capacitor bank can be individually charged to the same or different voltages. The generator further comprises a flash trigger switch connected to a trigger output for providing a trigger voltage to a flash device connectable to the generator.
Abstract:
The present Invention relates to a method and a flash unit for increasing the stability in an electron flash tube within its dynamic range. The present invention discloses that a flash discharge (F) is preceded by a pre-discharge (G) which is made with an amount of energy which preheats the gas in the electron flash tube but which does not emii any significant light, whereby the harmful effects of colour temperature shift, colour temperature variations, light quantity variations and aborted flash discharges are reduced substantially at low light quantities.
Abstract:
The present invention relates to an adapter (1 ) with a first lamp socket (11 ) adapted to permit a connection of a lamp (2) intended for a first voltage and a first current to a second lamp socket (31 ) belonging Io a device (3) intended for a second voltage and a second current. A safety circuit (12) belonging to the adapter {1 } comprises a breaking component (12a) connected in series to the first lamp socket (11 ), and adapted to maintain a closed initial state if a device (3) to which the adapter (1 ) is connected supplies the first current, or to assume an open breaking state if a device (3) to which the adapter (1 ) is connected supplies the second current The safety circuit also comprises a short-circuiting component (12b) connected in parallel with the first lamp socket (11 ) and adapted to maintain an open initial state if a device (3) to which the adapter (1 ) is connected supplies the first voltage, or to assume a closed short circuiting state If a device (3) to which the adapter (1 ) is connected supplies the second voltage.
Abstract:
The present invention generally relates to the field of communication between electronic devices used for photography. In particular, the invention relates to a method, transmission unit, system and computer program for wireless communication between a camera and at least one remote flash device, such as photoflash units and related equipment. More in particular, the invention provides a way of controlling a plurality of flash devices from an intermediate radio transmission unit mountable on the camera, and utilized a delay a sequence flash control sequence so as to synchronize the function of the camera and the remote flash devices during image acquisition. Further the invention provides a way of controlling in the photoflash units settings for the main flash, wherein the setting are the last settings determined by the camera when the intermediate radio transmission unit was in a TTL-mode.
Abstract:
The present invention relates to the field of flash tubes for photographic use, in particular to a flash tube comprising a trigger element for triggering a flash in the flash tube. Accordingly, a flash tube is provided. The flash tube comprises a glass envelope enclosing a gas for use in a flash tube; a first electrode inside the glass envelope; a second electrode inside the glass envelope; and an electrically conductive trigger element being configured to receive a high voltage pulse for at least partly ionizing the gas inside the glass envelope in order to trigg a flash in said flash tube, wherein said electrically conductive trigger element extends along the glass envelope from a first point on the glass envelope adjacent to the first electrode to a second point on the glass envelope adjacent to the second electrode such that a single unified spark stream which bridges the first and second electrodes inside the glass envelope is formed in the at least partly ionized gas adjacent to said electrically conductive trigger element when said electrically conductive trigger element receives the high voltage pulse.