JP2021189300A - Lens device and imaging apparatus - Google Patents

Abstract

To provide, for example, a lens device that is advantageous for a person to be photographed to grasp a photographing state.SOLUTION: A lens has: an optical element that can vary its state so as to change at least one of a focal distance, a depth of field, and brightness; a detection unit that detects the state; a light emitting unit that is arranged to face a subject; and a control unit that changes a light emitting state of the light emitting unit based on the state.SELECTED DRAWING: Figure 1

Description

The present invention relates to a lens device and an image pickup device.

A box-shaped television lens (Patent Document 1) used for television photography and sports broadcasting in a studio is provided with a light emitting unit called a tally lamp. The tally lamp lights up according to the shooting state of the TV camera connected to the TV lens. By visually recognizing the light emission of the tally lamp, the photographed person such as a caster, the photographing staff, and the like can grasp which image pickup device is in operation for broadcasting. An indicator indicating the focal length and the aperture value is provided on the side surface of the television lens described in Patent Document 2, and a shooting staff other than the photographer of the television lens can visually recognize the display of the indicator to focus the television camera. It is possible to grasp shooting information such as distance.

Japanese Unexamined Patent Publication No. 2005-352281 Japanese Unexamined Patent Publication No. 2008-124913

Since the indicator of the television lens is arranged on the side surface of the television lens, it is difficult for the photographed person to visually recognize the indicator. Therefore, when the cameraman takes a close-up of the facial expression of the photographed person, the photographed person cannot recognize the fact and may take his / her eyes off the TV camera. On the contrary, when the zoom state of the television lens is in the wide state, the photographed person may look at the camera and a scene different from the intention of the cameraman may be photographed. That is, the intention may be different between the cameraman and the photographed person.

An object of the present invention is, for example, to provide a lens device that is advantageous for a person to be photographed to grasp a photographing state.

In order to achieve the above object, the lens apparatus of the present invention comprises an optical element whose state is variable so as to change at least one of focal length, depth of field, and brightness, and detection for detecting the state. It is characterized by having a means, a light emitting unit arranged so as to face the subject, and a control means for changing the light emitting state of the light emitting unit based on the above state.

According to the present invention, for example, it is possible to provide a lens device that is advantageous for a person to be photographed to grasp a photographing state.

Perspective view of the lens apparatus in the embodiment of the present invention Front view of the lens device in the embodiment of the present invention Partial sectional view of the lens apparatus in the embodiment of the present invention. Schematic configuration diagram of the system of the lens apparatus in the embodiment of the present invention

The lens apparatus of the present invention faces an optical element whose state is variable so as to change at least one of focal length, depth of field, and brightness, a detection unit that detects the state, and a subject. It is characterized by having a light emitting unit arranged in the light emitting unit and a control unit for changing the light emitting state of the light emitting unit based on the above state.
The lens apparatus according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.
1 to 4, the lens device L includes a lens body 10, a lens cover 20 that covers the lens body 10 from the outer periphery, and a mount portion 30 for connecting the lens device L to the camera device.

The lens cover 20 is formed with an opening 21 for the lens body 10 to shoot through the opening. Further, side tally 40s are configured on the left and right side surfaces of the lens cover 20. The side tally 40 is formed by closing the side opening 22 of the lens cover 20 with a side tally plate 41 made of a transparent resin material. A plurality of front tally 50s are arranged on the front surface of the lens cover 20 (50a to 50h). The front tally 50 is formed by closing a plurality of front openings 23 (23a to 23h) formed in the lens cover 20 with a front tally plate 51 made of a transparent resin material.

The lens body 10 is configured with a lens barrel 12 that holds a lens group including a zoom lens group (optical element) 11, and the rear end portion of the lens barrel 12 is assembled to a mount portion 30. An indicator 31 is provided on the side surface of the mount portion 30 to display the focal length, aperture value, extender, and the like of the lens device L. A plurality of light emitting bodies (light emitting elements) 90 (90a to 90h) are provided on the outer peripheral portion of the lens barrel 12, and the light emitting body 90 is connected to a lens substrate (not shown). Here, the light emitter 90 is a light source capable of emitting light of a plurality of colors. When the light emitted from the light emitting body 90 passes through the side tally 40 on the left and right side surfaces of the lens cover 20 and the front tally 50 on the front surface, the light emitted from the light emitting body 90 can be visually recognized from the outside.

Next, the outline of the system of this embodiment will be described with reference to FIG. The zoom lens group 11 is driven and controlled by a zoom drive control unit 102 on a lens substrate (not shown), and is driven in the optical axis direction by the zoom drive means 103. The position of the zoom lens group 11 is detected by the zoom position detection unit (detection unit) 104. The system calculation unit (control unit) 101 instructs the tally control unit 105 of the emission color of the light emitter 90 based on the information output from the zoom position detection unit 104. When the position (focal length) of the zoom lens group 11 of the lens device L is on the wide side of the drive range, the light emitter 90 is instructed to emit red light. On the contrary, when the position (focal length) of the zoom lens group 11 is on the telephoto side of the drive range, the light emitter 90 is instructed to emit green light. Regarding the boundary of the focal length of whether the light emitting body 90 emits light in red or green, a threshold value may be set / changed according to the shooting situation. When the lens device L receives the tally signal 106 from a camera device (not shown), the front tally 50 is turned on by the light emitted from the light emitter 90. By visually recognizing the color of the front tally 50, the photographed person can grasp the focal length of the lens device L. When the photographed person turns his / her eyes to the television lens whose front tally 50 emits green light, the cameraman can obtain an image that captures the photographed person's face up and the photographed person's eyes.

As described above, according to the present invention, it is possible to provide a lens device in which the focal length taken by the lens device is easily transmitted to the photographed person.

As the light emitting body, a multicolor LED in which a plurality of LEDs having different light emitting colors are configured in one light emitting body, or a near-ultraviolet LED or a purple LED is used to emit light of three colors of red, green, and blue. If it is possible to emit light of a plurality of colors, such as a light emitting means for causing the light to be emitted, the light emitting means is not limited.

In this embodiment, a change in the emission color of the light emitting body is used as a means for transmitting the focal length to the photographed person, but the method is not limited as long as the change in the light emitting state of the light emitting body is transmitted to the photographed person. For example, a method may be used in which the light emitting body is blinked, the light emitting cycle becomes faster as the focal length approaches the telephoto end, and the lighting is maintained at the telephoto end. Further, a method may be used in which the light emitting points and the light emitting order of the plurality of light emitting bodies are changed according to the focal length, or the light emitting intensity of the light emitting bodies may be changed according to the focal length, and the above-mentioned methods are combined. May be used. That is, the light emitting unit may include a plurality of light emitting elements, and the light emitting state may be characterized in that it relates to at least one of a light emitting location and a light emitting order. In addition, although the light emitting unit that conveys the focal length to the photographed person has a function of also serving as a tally lamp, by configuring the light emitting part and the tally lamp separately, the photographed person is in a state where the tally signal is OFF. Can grasp the focal length of the lens. Further, although an example in which the light emitting part is divided into eight places and arranged in a circular shape is shown, a single rectangular light emitting part may be used, and the number and shape thereof are not limited. Further, although the light emitter is provided on the lens body, it may be provided on the lens cover side.

In the embodiment, the light emitting state of the light emitter is changed based on the position (focal length) of the zoom lens group (optical element) so that the photographed person can recognize the focal length, but the present invention is limited to this. There is no such thing.

For example, it can be applied to change the light emitting state of the light emitting body based on the state (position) (F value) of the iris (optical element, aperture diaphragm) so that the photographed person can recognize the F value. In this case, for example, the depth of field becomes shallower from the pan-focus state and the subject is focused up, or vice versa, the depth of field becomes deeper and the subject is pan-focused from the focus-up state of the subject. It is possible to recognize the shooting state that changes to.

Further, it is possible to provide an image pickup apparatus capable of enjoying the effect of the present invention by an image pickup apparatus having the lens apparatus of the present invention and an image pickup device that receives an image formed by the lens apparatus.

That is, the present invention is not limited to the present embodiment, and various modifications and changes can be made within the scope of the gist thereof.

L ・ ・ ・ ・ Lens device 11 ・ ・ ・ ・ Zoom lens group (optical element)
50 ... Front tally (light emitting part)
90 ・ ・ ・ ・ Luminous body 101 ・ ・ ・ ・ System calculation unit (control unit)
104 ... Zoom position detection unit (detection unit)

Claims (6)

Optical elements that are variable in state to change at least one of focal length, depth of field, and brightness.
A detector that detects the above state and
A light emitting part arranged so as to face the subject,
A control unit that changes the light emitting state of the light emitting unit based on the above state,
A lens device characterized by having. The lens device according to claim 1, wherein the light emitting state relates to at least one of a light emitting color, a light emitting intensity, and a light emitting cycle. The light emitting unit includes a plurality of light emitting elements.
The light emitting state relates to at least one of a light emitting point and a light emitting order.
The lens apparatus according to claim 1 or 2, wherein the lens device is characterized by the above. The lens device according to claim 1, wherein the optical element includes at least one of a zoom lens group and an aperture diaphragm. The lens device according to any one of claims 1 to 4, wherein the light emitting unit has a function of a tally lamp. An image pickup apparatus comprising the lens apparatus according to any one of claims 1 to 5, and an image pickup element for taking an image formed by the lens apparatus.

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