JPH06253190A - Image pickup device - Google Patents

Abstract

PURPOSE:To reduce the size of the device, to decrease the cost, and to enlarge the diameter of an optical window. CONSTITUTION:An optical window 1 consists of an optical member 2 transmitting the light from the ultraviolet ray to the visible light and an optical member 3 transmitting the infrared ray. The light receiving range of the optical members 2 and 3 changes by moving the optical window 1 by an optical window driving section 8 in the direction shown by an arrow A. The light from the ultraviolet ray to the visible light which transmit the optical member 2 and the infrared ray which transmits the optical member 3 are collected by a light collection system 4. A light separation optical system 5 divides the light from the ultraviolet ray to the visible light and the infrared ray. The light from the ultraviolet ray to the visible light divided by the system 5 is received and detected by a visible detector 6. The infrared ray divided by the system 5 is received and detected by an infrared ray detector 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image pickup device, and more particularly to an image pickup device provided with an optical window for transmitting light from ultraviolet rays to infrared rays.

[0002]

2. Description of the Related Art Conventionally, in an image pickup device having an optical window, the wavelength range from ultraviolet rays to infrared rays is divided into a plurality of wavelength ranges, and an optical window and a condensing optical system corresponding to each of the plurality of wavelength ranges are provided. Or a structure having an optical window made of one optical material that transmits all light from ultraviolet rays to infrared rays and a condensing optical system common to all the light rays from ultraviolet rays to infrared rays.

That is, when the wavelength range from ultraviolet rays to infrared rays is divided into a plurality of wavelength ranges, the image pickup device comprises a visible image pickup section 9 and an infrared image pickup section 10, as shown in FIG.

The visible image pickup section 9 has an optical window 11 for transmitting light in a wavelength range from ultraviolet rays to visible rays, and a condensing optical system 12 for condensing the transmitted light from ultraviolet rays to visible rays. It is composed of a visible detector 13 which detects and receives light.

The infrared imaging section 10 has an optical window 14 for transmitting infrared light, a condensing optical system 15 for condensing the transmitted infrared light, and an infrared detection for receiving and detecting the condensed infrared light. And a container 16.

On the other hand, an image pickup apparatus having an optical window made of one optical material that transmits all the light from ultraviolet rays to infrared rays has a condensing optical system for condensing the light transmitted through the optical window, and the condensed light to ultraviolet rays. To visible light and infrared light, a spectroscopic optical system, a visible detector that receives and detects the separated light from ultraviolet rays to visible light, and an infrared that receives and detects the separated infrared light. It is composed of a detector.

[0007]

In the above-mentioned conventional image pickup device, when the wavelength range from ultraviolet rays to infrared rays is divided into a plurality of wavelength ranges, an optical window and a condensing optical system corresponding to each of the plurality of wavelength ranges. Therefore, it is difficult to reduce the size and cost of the device.

Further, in an image pickup device having an optical window made of one optical material that transmits all the light rays from the ultraviolet rays to the infrared rays, few and large crystals are used as the optical material that transmits all the light rays from the ultraviolet rays to the infrared rays. It is difficult to increase the diameter of the optical window due to the material of the optical material, which is difficult, and the optical material is easily oxidized, so that there is a drawback that characteristics change is likely to occur.

Therefore, an object of the present invention is to solve the above-mentioned drawbacks and to provide an image pickup apparatus which can reduce the size and cost of the apparatus and can increase the diameter of the optical window. It is in.

[0010]

An image pickup device according to the present invention is an image pickup device having a detecting means for detecting light from ultraviolet rays to infrared rays, and is light of a preset first wavelength band among the light rays. An optical window including a first transmission region that transmits light and a second transmission region that transmits light in a second wavelength region different from the first wavelength region; and the first and second optical windows in the optical window. And a varying means for varying the ratio of each of the transmission regions.

[0011]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an example of an image pickup apparatus according to an embodiment of the present invention, and FIG. 2 is a block diagram showing an optical window according to an embodiment of the present invention. In these figures, the optical window 1 is composed of an optical material 2 such as glass or crystal that transmits light from ultraviolet rays to visible light, and an optical material 3 such as germanium that transmits infrared light.

The optical material 2 and the optical material 3 are connected so as to divide the aperture of the optical window 1 into two regions, and the light receiving range of each of the optical material 2 and the optical material 3 is such that the optical window 1 is the optical window driving section. It is changed by being moved in the direction of arrow A by 8.

The light from the ultraviolet ray to the visible ray that has passed through the optical material 2 and the infrared ray that has passed through the optical material 3 are respectively condensed by the condensing optical system 4, and the light from the ultraviolet ray to the visible ray is divided by the spectroscopic optical system 5. It is split into light and infrared light.

The light from the ultraviolet rays to the visible rays split by the spectroscopic optical system 5 is received and detected by the visible detector 6, and the infrared light split by the spectroscopic optical system 5 is received and detected by the infrared detector 7. .

Therefore, when the optical window driving unit 8 moves the optical window 1 in the direction of arrow A, and the light receiving ranges of the optical material 2 and the optical material 3 change, the visible detector 6 and the infrared detector 7 The ratio of the light received and detected changes. The light receiving range of each of the optical material 2 and the optical material 3 can be changed in the range of 0 to 100% according to the change of the light receiving conditions.

For example, when the visible light detector 6 and the infrared detector 7 detect light emitted from the earth from ultraviolet rays to infrared rays by mounting this image pickup device on an artificial satellite, the artificial satellite has entered the night side of the earth. Sometimes, the ratio of light received and detected by the infrared detector 7 is increased, and the ratio of light detected and received by the visible detector 6 when the artificial satellite enters the dayside of the earth is increased. This makes it possible to efficiently observe the night side and the day side of the earth.

As described above, by using the optical window in which the optical material 2 transmitting the light from ultraviolet rays to the visible light and the optical material 3 transmitting the infrared light are connected, the optical window 1
Also, since the condensing optical system 4 may be commonly provided for light from ultraviolet rays to visible light and infrared light, it is possible to reduce the size and cost of the device.

In addition, the optical window 1 is moved by the optical window drive unit 8 as indicated by an arrow A.
By moving the optical material 2 and the optical material 3 in the direction of, the light receiving range of each of the optical material 2 and the optical material 3, that is, the ratio of the light received and detected by the visible detector 6 and the infrared detector 7 can be changed. Therefore, the apparent effective diameters of the wavelength range from ultraviolet rays to visible rays and the wavelength range of infrared rays can be adjusted, and the incident energy to the visible detector 6 and the infrared detector 7 can be adjusted as necessary. be able to.

Further, as the optical material 2 and the optical material 3, conventional materials can be used, and therefore the optical window 1
Since there is no restriction on the material or the like in the manufacturing of (1), the diameter of the optical window 1 can be increased.

[0021]

As described above, according to the present invention, the first transmission region for transmitting the light in the preset first wavelength region of the light from the ultraviolet rays to the infrared rays through the optical window and the first window.
And a second transmission region that transmits light in a second wavelength region different from the second wavelength region, and by varying the ratio of each of the first and second transmission regions, the device can be downsized and reduced. There is an effect that the price can be increased and the diameter of the optical window can be increased.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an example of an image pickup apparatus according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing an optical window according to an embodiment of the present invention.

FIG. 3 is a block diagram showing an example of a conventional image pickup apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical window 2 Optical material that transmits light from ultraviolet rays to visible light 3 Optical material that transmits infrared light 4 Condensing optical system 5 Spectroscopic optical system 6 Visible detector 7 Infrared detector 8 Optical window drive section

Claims (3)

[Claims] 1. An image pickup apparatus having a detection means for detecting light from ultraviolet rays to infrared rays, wherein the first transmission area and the first transmission area for transmitting light of a preset first wavelength region of the light are provided. An optical window including a second transmission region that transmits light in a second wavelength region different from the first wavelength region, and a variable unit that varies the ratio of each of the first and second transmission regions in the optical window. An imaging device comprising: 2. The optical window comprises the first and second transmissive regions divided by a straight line into two regions on a plane orthogonal to the optical axis of the light, and the variable means controls the optical window. The image pickup apparatus according to claim 1, comprising means for moving in a direction orthogonal to the straight line on the surface. 3. The image pickup apparatus according to claim 1, wherein the first wavelength range is a visible light range and the second wavelength range is an infrared range.