JP2015194576A - Illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain a bounce illumination state even when changing an angle of a camera.SOLUTION: An illumination device 2 including a light emitting unit 4 emitting illumination light illuminating a subject, and a main body unit 6 rotatably supporting the light emitting unit in an upper/lower direction and left/right direction comprises: an acquisition unit 19 that acquires a camera inclination angle from the camera in one direction of a vertical direction of a camera to which the illumination device is attached and a horizontal direction thereof; a setting instruction unit 16 that instructs to set an illumination inclination angle of the light emitting unit relative to the main body unit; a storage unit that stores the camera inclination angle acquired from the camera by the acquisition unit as a reference camera inclination angle when setting the illumination inclination angle; a calculation unit that calculates a difference between the reference camera inclination angle and the camera inclination angle acquired by the acquisition unit; and a drive control unit that causes the light emitting unit to be rotated in the upper/lower direction and left/right direction relative to the main body unit so as to illuminate an illumination direction of the light emitting unit in setting the illumination inclination angle on the basis of the difference calculated by the calculation unit.

Description

  The present invention relates to an illumination device that can be used for bounce photography.

  Conventionally, a bounce strobe device that calculates an appropriate bounce angle based on a distance from a camera to a subject and changes an irradiation angle of the strobe device is known (for example, see Patent Document 1). In this bounce strobe device, it is possible to perform bounce shooting while illuminating at an appropriate bounce angle.

JP-A-1-304440

  However, in the above bounce strobe device, only the bounce angle in the vertical direction is calculated, so when shooting while changing the camera angle in various directions, the same bounce illumination state as before changing the angle is maintained. There was a problem that could not be done.

  The objective of this invention is providing the illuminating device which can maintain a bounce illumination state, even if the angle of a camera is changed.

  An illuminating device of the present invention is an illuminating device including a light emitting unit that emits illumination light that illuminates a subject, and a main body that rotatably supports the light emitting unit in a vertical direction and a horizontal direction. An acquisition unit that acquires from the camera at least one camera tilt angle in a vertical direction and a horizontal direction of the camera, a setting instruction unit that instructs setting of an illumination tilt angle with respect to the main body unit of the light emitting unit, and the illumination tilt angle A storage unit that stores the camera tilt angle acquired from the camera by the acquisition unit as a reference camera tilt angle at the time of setting, a difference between the reference camera tilt angle and the camera tilt angle acquired by the acquisition unit Based on the calculation unit to be calculated and the difference calculated by the calculation unit, the illumination direction of the light emitting unit at the time of setting the illumination inclination angle is illuminated. Said light emitting portion so as to, characterized in that it comprises a drive control unit for rotating the vertical and horizontal directions relative to the body portion.

  According to the illumination device of the present invention, the bounce illumination state can be maintained even when the angle of the camera is changed.

It is the figure which looked at the internal mechanism of the illuminating device which concerns on embodiment from the side. It is the figure which looked at the internal mechanism of the light emission part of the illuminating device which concerns on embodiment from the upper direction. It is a block diagram which shows the system configuration | structure of the illuminating device and camera which concern on embodiment. It is a flowchart which shows the bounce imaging | photography process using the illuminating device which concerns on embodiment. It is a figure which shows the state at the time of the bounce imaging | photography of the illuminating device which concerns on embodiment. It is a figure which shows the inclination angle of the up-down direction of the illuminating device which concerns on embodiment, and a camera. It is a figure which shows the inclination angle of the left-right direction of the illuminating device which concerns on embodiment, and a camera. It is a figure which shows the state which rotated the camera with which the illuminating device which concerns on embodiment was attached to the surroundings of an optical axis.

  Hereinafter, an illumination device according to an embodiment will be described with reference to the drawings. FIG. 1 is a view of an internal mechanism of a lighting device 2 according to an embodiment as viewed from the side, and FIG. 2 is a view of the same from above. The lighting device 2 includes a light emitting unit 4 and a main body unit 6, and the light emitting unit 4 is supported so as to be rotatable with respect to the main body unit 6 in the vertical direction and the horizontal direction.

  Inside the main body 6, a vertical rotation mechanism 8 that rotates the light emitting unit 4 in the vertical direction with respect to the main body 6, a vertical driving unit 10 (see FIG. 3) that drives the vertical rotation mechanism 8, and a light emitting unit. A left-right rotation mechanism 12 that rotates 4 in the left-right direction with respect to the main body 6 and a left-right drive unit 14 that drives the left-right rotation mechanism 12 (see FIG. 3) are provided.

  In addition, on the back surface of the main body 6, vertical and horizontal inclination angles (hereinafter referred to as illumination inclination angles) with respect to the main body 6 of the light emitting unit 4 set by the operator are stored in the storage unit 30 (see FIG. 3). The setting button 16 to be stored is provided, and a mounting leg 18 to be attached to the hot shoe 66 (see FIG. 8) of the camera 40 (see FIG. 8) is provided on the lower surface of the main body 6. The mounting leg 18 is provided with a communication terminal 19 that performs communication with the camera 40 in a state where the lighting device 2 is mounted on the camera 40.

  Further, inside the light emitting unit 4, there are provided a xenon tube 20 that is a light emitting element, and a Fresnel panel 22 that condenses illumination light emitted from the xenon tube 20. The subject is illuminated with the illumination light collected by the Fresnel panel 22.

  FIG. 3 is a block diagram illustrating a system configuration of the illumination device 2 and the camera 40 according to the embodiment. The illuminating device 2 includes a CPU 24 that comprehensively controls each unit of the illuminating device 2, and the CPU 24 includes a light emitting circuit 26 that adjusts the light emission amount of the xenon tube 20, the vertical drive unit 10, the left and right drive unit 14, the setting button 16, and the like. A storage unit 30 that stores an illumination tilt angle when the setting button 16 is operated, and a tilt angle of the housing of the camera 40 (hereinafter referred to as a camera tilt angle), and a measurement unit that measures the illumination tilt angle. 32 and a communication terminal 19 for performing communication with the camera 40.

  The camera 40 includes a CPU 44 that controls each part of the camera 40 in an integrated manner. The CPU 44 images an object light, an operation unit 46 including a power switch 62 (see FIG. 8), a shutter button 64 (see FIG. 8), and the like. An image sensor 48 for generating an image signal, an LCD display unit 50 for displaying an image based on the image signal from the image sensor 48, an acceleration sensor 52 for measuring the camera tilt angle, and image data based on the image signal from the image sensor 48. A memory card 54 that stores data and a communication terminal 56 that performs communication with the lighting device 2 are provided.

  Next, with reference to a flowchart shown in FIG. 4, a bounce photographing process using the illumination device 2 according to the embodiment will be described. First, when the illuminating device 2 is attached to the hot shoe 66 of the camera 40 via the mounting leg 18 and the illuminating device 2 is turned on, the CPU 24 causes the measuring unit 32 to perform the operation on the main body 6 of the light emitting unit 4. A process of measuring the tilt angles in the vertical direction and the horizontal direction is started (step S1).

  Next, the CPU 24 performs communication with the camera 40 via the communication terminal 19 and starts processing for acquiring the camera tilt angle measured by the acceleration sensor 52 from the camera 40 (step S2).

  Next, the light emitting unit 4 is rotated in a predetermined illumination direction by the operator, and the setting button 16 is operated. Here, as shown in FIG. 5, the predetermined illumination direction is an illumination direction in which the subject 60 can be illuminated with appropriate brightness by the indirect light reflected from the ceiling. The camera 40 to which the lighting device 2 is attached is not fixed to a tripod or the like, and is held by the operator.

  When the setting button 16 is operated, the CPU 24 stores the illumination inclination angle measured by the measuring unit 32 when the setting button 16 is operated in the storage unit 30 as a reference illumination inclination angle (hereinafter referred to as a reference illumination inclination angle). (Step S3).

  Similarly, the CPU 24 stores the camera tilt angle acquired from the camera 40 when the setting button 16 is operated in the storage unit 30 as a reference camera tilt angle (hereinafter referred to as a reference camera tilt angle) (step S4).

  Next, when the operator changes the angle of the camera 40, the CPU 24 reads the vertical reference camera tilt angle and the horizontal reference camera tilt angle from the storage unit 30, and the vertical reference camera tilt angle and the camera are read out. The difference between the vertical camera tilt angle acquired from the camera 40 (hereinafter referred to as the vertical difference) and the difference between the horizontal camera tilt angle acquired from the camera 40 and the horizontal camera tilt angle acquired from the camera 40 (hereinafter referred to as the left and right). (Referred to as direction difference) is calculated (step S5).

  For example, as shown in FIG. 6A, when the reference illumination inclination angle in the vertical direction is set to θ1 °, the camera 40 is inclined ψ1 ° upward as shown in FIG. 6B. And In this case, the CPU 24 calculates θ1 ° −ψ1 ° as the vertical direction difference.

  Similarly, as shown in FIG. 7A, when the reference illumination inclination angle in the left-right direction is set to θ2 °, the camera 40 is inclined ψ2 ° to the right as shown in FIG. 7B. Suppose that In this case, the CPU 24 calculates θ2 ° −ψ2 ° as the left-right direction difference.

  Next, the CPU 24 adjusts the illumination tilt angle in the vertical direction and the illumination tilt angle in the horizontal direction based on the vertical direction difference and the horizontal direction difference (step S6). For example, the CPU 24 causes the vertical driving unit 10 to rotate the light emitting unit 4 downward by ψ1 ° (see FIG. 6B) to change the vertical illumination tilt angle to (θ1−ψ1) °. Similarly, the left and right driving unit 14 rotates the light emitting unit 4 to the left by ψ2 ° (see FIG. 7B) to change the illumination tilt angle in the left and right direction to (θ2−ψ2) °.

  Next, when the shutter button 64 is pressed, the CPU 24 causes the light emitting circuit 26 to emit light from the xenon tube 20, and irradiates illumination light in the same illumination direction as when the setting button 16 is operated as shown in FIG. Let The illumination light is reflected once from the ceiling, and the subject 60 is illuminated by the indirect light reflected from the ceiling.

  The camera 40 captures the subject 60 in a state where the subject 60 is illuminated by indirect light (step S7).

  According to the lighting device 2 according to the present embodiment, when the camera tilt angle changes after the operator sets the reference illumination tilt angle, the direction of the light emitting unit 4 is rotated in a direction to cancel the tilt angle change. By doing so, the bounce illumination state can be maintained even if the angle of the camera 40 is changed. For this reason, it is not necessary for the operator to change the tilt angle of the light emitting unit each time the angle of the camera 40 is changed.

  In the above-described embodiment, as shown in FIG. 8, when the angle of the camera 40 is changed from horizontal position shooting to vertical position shooting, the acceleration sensor 52 of the camera 40 rotates around the optical axis of the shooting lens 68. The optical axis tilt angle that is the rotation angle may be measured, and the reference optical axis tilt angle may be stored in the storage unit 30 when the setting button 16 is operated. When the optical axis tilt angle further changes, the CPU 24 causes the vertical driving unit 10 and the left and right driving unit 14 to rotate the light emitting unit 4 in the vertical direction and the horizontal direction with respect to the main body unit 6, and thereby the optical axis. The direction of the light emitting unit 4 is changed in a direction to cancel the change in the direction inclination angle. Thereby, for example, even when the angle of the camera 40 is changed from horizontal position shooting to vertical position shooting, the bounce illumination state at the time of operating the setting button 16 can be maintained.

  In the above-described embodiment, the illumination tilt angle may be adjusted using the distance measuring function of the camera 40. In this case, the CPU 24 acquires information about the distance from the subject 60 to the camera 40 measured by a distance measuring unit (not shown) from the camera 40. When the setting button 16 is operated, the CPU 24 stores the distance based on the information about the distance acquired when the setting button 16 is operated as the reference distance in the storage unit 30.

  Next, when the distance from the subject 60 to the camera 40 changes, the CPU 24 calculates a distance difference between the reference distance and the distance from the current subject to the camera 40. Further, the light emitting unit 4 is rotated by the vertical drive unit 10 and the left and right drive unit 14 with reference to the distance difference so as to illuminate the illumination direction when the setting button 16 is operated.

  In the above-described embodiment, the acceleration sensor 52 may be provided in the main body 6 of the lighting device 2. In this case, instead of acquiring the camera tilt angle from the camera 40, the main body tilt angle, which is the tilt angle of the main body unit 6, is measured. Then, when the setting button 16 is operated to set a reference main body tilt angle, and the main body tilt angle changes later, the CPU 24 rotates the direction of the light emitting unit 4 in a direction to cancel the change in the tilt angle.

DESCRIPTION OF SYMBOLS 2 ... Illuminating device, 4 ... Light emission part, 6 ... Main body part, 8 ... Vertical rotation mechanism, 10 ... Vertical drive part, 12 ... Left-right rotation mechanism, 14 ... Left-right drive part, 16 ... Setting button, 19 ... Communication terminal 20 ... xenon tube, 24 ... CPU, 30 ... storage unit, 32 ... measuring unit, 40 ... camera, 52 ... acceleration sensor

Claims (2)

In an illuminating device comprising: a light emitting unit that emits illumination light that illuminates a subject; and a main body unit that rotatably supports the light emitting unit in a vertical direction and a horizontal direction.
An acquisition unit that acquires, from the camera, at least one camera tilt angle in a vertical direction and a horizontal direction of a camera to which the illumination device is attached;
A setting instruction unit for instructing setting of an illumination inclination angle with respect to the main body unit of the light emitting unit;
A storage unit that stores the camera tilt angle acquired from the camera by the acquisition unit when the illumination tilt angle is set, as a reference camera tilt angle;
A calculation unit that calculates a difference between the reference camera tilt angle and the camera tilt angle acquired by the acquisition unit;
Based on the difference calculated by the calculation unit, the light emitting unit is rotated in the vertical direction and the horizontal direction with respect to the main body unit so as to illuminate the illumination direction of the light emitting unit when the illumination inclination angle is set. An illumination device comprising: a drive control unit. The acquisition unit acquires information on the distance from the subject to the camera from the camera,
The lighting device according to claim 1, wherein the drive control unit rotates the light emitting unit based on information on the distance acquired from the camera.

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