JP2013171075A - Illuminating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix an optical accessory, which changes the color characteristic of transmitted light, to the front of a light emitting portion without spoiling the quality of appearance.SOLUTION: An illuminating device in which an optical accessory for changing the color characteristic of transmitted light can be attached to the front of a light emitting portion; an optical member stored in the upper part of the internal portion of the light emitting portion and held so as to be movable in the direction of the optical axis of light emitted by the light emitting portion; and a projecting portion, provided on the upper surface of the light emitting portion, around which a finger is hooked to pull out the stored optical member. The projecting portion is fitted in a recess formed in the top of the optical accessory, thereby fixing the optical accessory to the illuminating device.

Description

  The present invention relates to an illuminating device in which an optical accessory that changes a color characteristic of transmitted light can be attached in front of a light emitting unit.

  Generally, in an illumination device such as a strobe device used in a camera, a discharge tube such as a xenon tube is used as the light source. The color temperature of irradiation light (strobe light) in a strobe device using a xenon tube is set near sunlight (6000 K). For this reason, when shooting is performed using a strobe device in an environment having a color temperature different from the color temperature, an unnatural color captured image may be obtained.

  Therefore, Patent Document 1 proposes a technique of changing the color temperature of the irradiation light of the strobe device by attaching a filter holder with an optical accessory such as a color filter attached in front of the light emitting unit of the strobe device.

JP 2009-20298 A

  However, in Patent Document 1 described above, the filter holder is only described as a cup-shaped member that is used by being applied to the front end portion in the irradiation direction of the head portion of the strobe device. It is not clearly stated whether it is fixed to. The filter holder is easily detached from the head portion only by covering the head portion with the cup-shaped filter holder.

  Therefore, it is conceivable to provide a fixing portion for fixing the filter holder on the upper surface of the head portion so that the filter holder does not easily come off from the head portion. However, such a fixing part only for fixing the filter holder is unnecessary when viewed from the stroboscope alone, and the upper surface of the light emitting part is a relatively conspicuous place in the stroboscopic device, so a fixing part is provided. As a result, the appearance quality of the strobe device is impaired.

  Accordingly, an object of the present invention is to enable an optical accessory that changes the color characteristics of transmitted light to be fixed in front of a light emitting unit without impairing the appearance quality.

  In order to achieve the above object, an illuminating device according to the present invention is an illuminating device in which an optical accessory that changes a color characteristic of transmitted light can be attached in front of a light emitting unit, and is an upper part inside the light emitting unit. An optical member that is held in a movable manner in the direction of the optical axis of the irradiation light of the light emitting unit, and a finger hook for pulling out the stored optical member provided on the upper surface of the light emitting unit. A projection portion to be used, and the projection portion is fitted into a recess provided in an upper portion of the optical accessory to fix the optical accessory to the illumination device.

  According to the present invention, an optical accessory that changes the color characteristics of transmitted light can be fixed in front of the light emitting unit without deteriorating the appearance quality.

1 is a block diagram illustrating a configuration of an imaging system according to an embodiment of the present invention. It is sectional drawing of the light emission part 350 of the state which attached the filter holder 10 ahead. It is the figure which removed the upper surface of the light emission part 350. FIG. It is a figure explaining the taking-out method of the wide panel. It is a figure which shows the state before attaching the filter holder 10 with which the color filter 16 was mounted | worn to the light emission part 350. FIG.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing a configuration of an imaging system according to the present embodiment. The imaging system according to the present embodiment includes a camera body 100 that is an imaging device, a lens unit 200 that can be attached to and detached from the camera body 100, and a strobe device 300 that is an illumination device that can be attached to and detached from the imaging device. In the strobe device 300, a filter holder 10, which is an optical accessory described later, is detachable in front of the light emitting unit 350, and the strobe device 300 attached with the filter holder 10 is hereinafter referred to as an illumination system.

  First, the configuration inside the camera body 100 will be described. A camera microcomputer (CCPU) 101 controls each part of the camera body 100. The camera microcomputer 101 is a one-chip IC circuit with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, etc. It has a configuration.

  The image sensor 102 is an image sensor such as a CCD or CMOS including an infrared cut filter, a low-pass filter, and the like. The shutter 103 is driven to shield the image sensor 102 when not photographing, and to guide a light beam to the image sensor 102 when photographing.

  The main mirror (half mirror) 104 reflects a part of light incident from a lens group 202 (to be described later) during non-photographing and forms an image on the focus plate 105. The image on the focus plate 105 is guided to the optical viewfinder 116 or the like via the pentaprism 114 and used to confirm the in-focus state of the subject.

  The photometric circuit 106 includes a photometric sensor (AE sensor) that divides the photographing screen into a plurality of photometric areas and performs photometry in each photometric area. The focus detection circuit 107 has a focus detection sensor (AF sensor) having a plurality of distance measuring points in the shooting screen.

  The gain switching circuit 108 switches the amplification gain of the signal from the image sensor 102, and the camera microcomputer 101 switches the gain according to shooting conditions, level setting based on a charging voltage condition described later, input by the photographer, and the like.

  The A / D converter 109 converts the amplified analog signal from the image sensor 102 into a digital signal. The timing generator (TG) 110 is used to synchronize the signal from the image sensor 102 and the conversion timing of the A / D converter 109.

  The digital signal processing circuit 111 performs image processing including white balance control on the image data converted into a digital signal by the A / D converter 109.

  The signal line SC is a signal line for an interface between the camera body 100, the lens unit 200, and the strobe device 300. For example, the camera microcomputer 101 is used as a host to exchange data and transmit commands to each other.

  The input unit 112 includes various operation units such as a release switch for starting a photographing operation. For example, the display unit 113 including a liquid crystal device, a light emitting element, and the like displays various settings and shooting information.

  The pentaprism 114 guides the light beam incident from the lens group 202 and reflected by the main mirror 104 to the AE sensor and the optical viewfinder 116 in the photometry circuit 106.

  The sub mirror 115 guides the light beam incident from the lens group 202 and transmitted through the semitransparent portion at the center of the main mirror 104 to the AF sensor of the focus detection circuit 107.

  Next, the configuration and operation within the lens unit 200 will be described. A lens microcomputer (LPU) 201 controls the operation of each part of the lens unit 200. The lens microcomputer 201 includes, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, and the like. It has become.

  The lens group 202 is composed of a plurality of lenses, and the lens driving unit 203 moves the lens group 202 in accordance with an instruction from the lens microcomputer 201 such as focus adjustment and change of focal length.

  The encoder 204 detects the position of the lens group 202 or the driving amount of the lens group 202. By transmitting the position information or drive information of the encoder 204 from the lens microcomputer 201 to the camera microcomputer 101, the camera microcomputer 101 can acquire information regarding the subject distance at the time of shooting. The diaphragm 205 adjusts the amount of light incident on the image sensor 102 by changing the aperture diameter, and is controlled by the lens microcomputer 201 via the diaphragm control circuit 206.

  Next, the configuration of the strobe device 300 as an illumination device will be described. The battery 301 supplies power for the strobe device (VBAT), and the booster circuit 302 boosts the voltage of the battery 301 to several hundred volts and charges the main capacitor 303. The charging voltage of the main capacitor 303 is divided by the resistor 304 and the resistor 305 in the voltage detection circuit 313, and the divided voltage is input to the strobe microcomputer 310. That is, the voltage detection circuit 313 is connected to both ends of the main capacitor 303 and detects the voltage of the main capacitor.

  The trigger circuit 306 is connected to the strobe microcomputer 310 and outputs a trigger voltage when receiving a trigger signal from the strobe microcomputer 310 when the discharge tube 307 emits light. The discharge tube 307 is a main light source that emits light using energy charged in the main capacitor 303 by receiving and exciting a trigger voltage of several KV applied from the trigger circuit 306.

  The light emission control circuit 308 controls the start of light emission of the discharge tube 307 by the trigger voltage from the trigger circuit 306, and controls the stop of light emission by the output of an AND gate 311 described later. The integration circuit 309 is an integration circuit that integrates the current generated when the photodiode 323 receives the irradiation light of the discharge tube 307, and the output of the integration circuit 309 is input to the inverting input terminal of the comparator 312 and the strobe microcomputer 310. .

  A strobe microcomputer (FPU) 310 controls the operation of each unit of the strobe device 300. The strobe microcomputer 310 is a one-chip IC circuit configuration with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D converter, D / A converter, etc. It has become. The strobe microcomputer 310 determines whether or not the filter holder 10 is attached and determines the color characteristics of the color filter 16 as described later.

  The comparator 312 has a non-inverting input connected to the strobe microcomputer 310 and an output connected to the AND gate 311. The AND gate 311 has an input not connected to the comparator connected to the flash microcomputer 310 and an output connected to the light emission control circuit 308. In this way, the integration level of the integration circuit 309 is compared with the reference level set by the flash microcomputer 310, and when the integration level of the integration circuit 309 reaches the reference level, the stop of light emission is controlled.

  The reflector 315 reflects the light emitted from the discharge tube 307 in the irradiation direction of the light emitting unit 350. The optical system 316 reduces the unevenness of the light emitted from the discharge tube 307 and widens the irradiation range of the light emitted from the discharge tube 307, such as a Fresnel lens configured by a transparent mold member that transmits light. It is an irradiation part. The input unit 320 includes various operation units for inputting settings of the flash device 300 and the like. The display unit 321 displays various states of the strobe device 300.

  The holder discriminating unit 322 discriminates whether or not the detachable filter holder 10 is attached to the light emitting unit 350, and the strobe microcomputer 310 performs filtering based on the detection result of the holder discriminating unit 322. It is determined whether or not the holder 10 is attached.

  The photodiode 323 is a sensor that receives the irradiation light of the discharge tube 307 as described above, and receives the irradiation light of the discharge tube 307 directly or via a glass fiber or the like. The current output from the photodiode 323 is integrated by the integration circuit 309 as described above.

  The filter discriminating unit 324 discriminates the color characteristics of the color filter 16 held in the filter holder 10 as shown in FIG. 2, and the strobe microcomputer 310 uses the color filter based on the detection result of the filter discriminating unit 324. The color characteristics of the image are determined.

  The light emitting unit 350 is a block mainly including the discharge tube 307, the reflector 315, the optical system 316, the detection system of the holder discrimination unit 322, and the detection system of the filter discrimination unit 324. They are connected by a hinge mechanism (not shown) and can be rotated in the vertical direction.

  Next, the light emitting unit 350 will be described in detail with reference to FIG. FIG. 2 is a longitudinal sectional view of the light emitting unit 350 with the filter holder 10 attached to the front.

  The storage chamber 2 provided in the upper part inside the light emitting unit 350 is a space for storing a wide panel 30, a wide panel holding member 7, a catchlight sheet (not shown), and the like which will be described later.

  The filter holder 10 is made of a colorless and transparent acrylic material or the like, and can be mounted and fixed in front of the light emitting unit 350.

  The color filter 16 is in the form of a film made of a thin PET material or the like that changes the color characteristics of transmitted light. The filter holder 10 holding the color filter 16 is attached to the light emitting unit 350, so that the light emitting unit The color characteristics of the irradiation light 350 can be changed. Note that filters of various colors can be attached to the filter holder 10 as the color filter 16, and the color characteristics of the irradiation light of the light emitting unit 350 can be changed variously by changing the filter attached to the filter holder 10. it can.

  The wide panel 30 is an irradiation range expansion member that is made of a colorless and transparent acrylic material or the like and that expands the irradiation range of the irradiation light by passing the irradiation light.

  The wide panel holding member 7 holds the wide panel 30 so as to be movable in the direction of the optical axis of the irradiation light of the light emitting unit 350, and allows the wide panel 30 to be inserted into and removed from the storage chamber 2. Further, the wide panel holding member 7 rotatably holds the wide panel 30 so that the wide panel 30 pulled out from the storage chamber 2 is positioned in front of the optical system 316.

  Next, the insertion / extraction of the wide panel 30 with respect to the storage chamber 2 will be described with reference to FIGS. 3 and 4. FIG. 3 is a diagram in which the top surface of the light emitting unit 350 is removed. FIG. 3A shows a state in which the wide panel 30 is stored in the storage chamber 2, and FIG. Shows the state of being positioned in front of the optical system 316.

  When the wide panel 30 is not used, the wide panel 30 is stored in the storage chamber 2 as shown in FIG. In this state, the end surface of the wide panel 30 on the optical system 316 side and the finger hooking portion 30a provided on the end surface are exposed to the outside from the opening 2c of the storage chamber 2 provided on the optical system 316. At this time, the click portion 7a of the wide panel holding member 7 is locked to the protrusion 2a in the storage chamber 2, and is held so that the wide panel 30 does not jump out due to its own weight or impact.

  When the photographer pulls out and uses the wide panel 30, the photographer puts his thumb on the finger-hanging portion 30 a of the wide panel 30 as shown in FIG. An index finger is applied to the protrusion 350b provided on the upper surface. With the index finger as a support, the thumb is moved in the pull-out direction of the wide panel 30 with the thumb, and the wide panel 30 is pulled out. By doing so, the click portion 7 a of the wide panel holding member 7 is detached from the protrusion 2 a, and the wide panel 30 is pulled out from the storage chamber 2.

  As described above, since the protrusion 350 b is provided on the upper surface of the light emitting unit 350, the wide panel 30 stored in the storage chamber 2 inside the light emitting unit 350 can be easily pulled out from the storage chamber 2. Note that the projection 350b is a plurality of cylindrical projections arranged in a direction substantially orthogonal to the optical axis of the light emitted from the light emitting unit 350, so that the photographer's finger is more easily applied than a single projection. .

  When the wide panel 30 is in the most extended position, the wide panel holding member 7 comes into contact with the stopper receiving portion 2b in the storage chamber 2 as shown in FIG. Since the wide panel 30 is rotatably held with respect to the wide panel holding member 7 and is further urged to rotate toward the optical system 316 by the urging spring 8, FIG. As shown in FIG. When the discharge tube 307 emits light in such a state, the light transmitted through the optical system 316 has its irradiation angle expanded by the wide panel 30 and irradiates the light from the discharge tube 307 in a wider range than when the wide panel 30 is not used. be able to.

  Next, the attachment of the color filter 16 to the filter holder 10 and the attachment of the filter holder 10 to the light emitting unit 350 will be described with reference to FIGS. FIG. 5 shows a state before the filter holder 10 equipped with the color filter 16 is attached to the light emitting unit 350.

  The color filter 16 is held in the filter holder 10 by being sandwiched between hook-shaped portions 29 a of the protrusions 29 provided at the lower part of the filter holder 10 while being inserted into the slits 32 provided at the upper part of the filter holder 10. Is done. The filter holder 10 is transparent and functions as an optical accessory that changes the color characteristics of light transmitted through one component without attaching a color filter by using an acrylic material with a color such as orange or green. It is also possible to make it. In that case, since the filter holder 10 does not have to hold the color filter 16, the protrusion 29 may not be provided with the hook-shaped portion 29a.

  As shown in FIG. 1, a concave portion 350 a that is a fixing portion for fixing the filter holder 10 to the light emitting portion 350 is provided on the lower surface of the light emitting portion 350. A projection 29 provided in the lower part of the filter holder 10 and used to hold the color filter 16 is fitted into the recess 350a.

  On the other hand, as shown in FIG. 5, a projection 350 b used as a finger hook when the wide panel 30 is pulled out is provided on the upper surface of the light emitting unit 350. This protrusion 350 b is fitted into a recess 10 b provided on the top of the filter holder 10, which is a fixing part for fixing the filter holder 10 to the light emitting part 350.

  When the filter holder 10 is attached to the light emitting unit 350, the projection 350b is fitted into the recess 10b, and then the filter holder 10 is rotated toward the light emitting unit 350 with the recess 10b as a rotation center. Then, the distal end side of the bending portion 6e provided at the lower portion of the filter holder 10 is bent, and the protrusion 29 moves in the direction of the recess 350 while contacting the lower surface of the light emitting portion 350. When the protrusion 29 reaches the position of the recess 350a, the protrusion 29 is fitted into the recess 350a, and the filter holder 10 is fixed to the light emitting unit 350 at both the upper part and the lower part.

  As shown in FIG. 5, the distance X from the end of the recess 10 b of the filter holder 10 to the outer peripheral surface is X> with respect to the gap A between the protrusions of the protrusion 350 b provided on the light emitting part 350. Configure as A.

  By doing so, the filter holder 10 is prevented from being assembled by being displaced in the direction in which the plurality of projections of the projecting portion 350b are arranged, and use in a state where the assembly is wrong can be prevented.

  As described above, by using the protrusion 350b used as a finger hook when pulling out the wide panel 30 accommodated in the light emitting unit 350, also as a fixing unit for fixing the filter holder 10 to the light emitting unit 350, The appearance quality of the upper surface of the light emitting unit 350 is not impaired.

  Note that the protrusion 350b is not only for pulling out the wide panel 30, but also for pulling out the catchlight sheet, which is a reflecting member that can reflect the irradiated light toward the subject and obtain a catchlight effect during bounce shooting. It may be used as a hook. Further, as long as it can be pulled out from a storage chamber provided on the upper surface inside the light emitting unit 350, it may be used as a finger hook when pulling out another optical member.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

2 Storage Chamber 3 Wide Panel 7 Wide Panel Holding Member 10 Filter Holder 16 Color Filter 300 Strobe Device 316 Optical System 350 Light Emitting Unit

Claims (5)

An illumination device capable of attaching an optical accessory that changes the color characteristic of transmitted light to the front of the light emitting unit,
An optical member housed in the upper part of the light emitting unit and held so as to be movable in the optical axis direction of the irradiation light of the light emitting unit;
A projection provided on the upper surface of the light emitting unit, and used as a finger hook when pulling out the stored optical member;
The projection device is fitted into a recess provided in an upper portion of the optical accessory, thereby fixing the optical accessory to the illumination device.   The lighting device according to claim 1, wherein the protrusion has a plurality of protrusions arranged in a direction substantially orthogonal to an optical axis of light emitted from the light emitting portion. A fixing portion provided on the lower surface of the light emitting portion;
The optical accessory changes the color characteristics of light transmitted by a held color filter,
3. The fixing device according to claim 1, wherein the fixing unit is provided with a protrusion provided on a lower portion of the optical accessory so as to sandwich and hold the color filter, thereby fixing the optical accessory to the lighting device. The lighting device described.   The illumination according to any one of claims 1 to 3, wherein the optical member is an irradiation range expansion member that expands an irradiation range of the irradiation light by allowing the irradiation light of the light emitting unit to pass therethrough. apparatus.   The lighting device according to claim 1, wherein the optical member is a reflecting member that reflects light emitted from the light emitting unit.

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