JPS63153985A - Image pickup device - Google Patents

Abstract

PURPOSE:To measure the color temperature of a part which is picked up actually at all times regardless of whether or not the image is zoomed up and to adjust white balance correctly by arranging a color temperature detection sensor at the periphery of an image pickup element. CONSTITUTION:A light beam 3 which enters a lens barrel 2 through a lens system 1 enters the image pickup element 5 through a filter 4. At this time, part of the light beam 3 is reflected and made incident on the color temperature detection sensor 6 arranged nearby the image pickup element of the lens barrel 2 of an image pickup device, so that the color temperature is measured. When the periphery of the sensor 6 is photographed, a scene of the periphery matching with the best color temperature of the periphery of the camera is picked up. In case of telephoto, the scene of the periphery of the video camera is cut by a zoom lens and only an image obtained in the telephoto is made incident on the lens, so that white balance is adjusted with the color temperature of the image.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an imaging device having a color detection element for achieving white balance in a video camera or the like.

[Conventional technology]

Conventionally, a color temperature detection sensor used in this type of imaging device has been placed on the front of the device, separate from the lens system. That is, as shown in FIG. 2, a color temperature detection sensor 6 was fixed on the outside of a lens barrel 2 in which a lens system 2, a filter 4, and an image sensor 5 were fixed.

[Problem that the invention seeks to solve]

Therefore, only the outside light around the sensor can be measured at any time. For example, when the lens is zoomed up, the color temperature of the image taken will not match the color temperature of the zoomed object, and the color temperature of the image around the video camera will be different from that of the video camera. The problem is that the white balance is set differently from the required hue of the object, and when the image signal is reproduced, it does not match the desired color.

[Means for solving problems]

The imaging device of the present invention captures images via the lens by arranging a color temperature detection sensor that detects the color temperature of external light around a lens for imaging and an imaging element that converts light into an electrical signal. It has the function of directly measuring the color temperature of the image that enters the element and matching the hue of the captured image to the required hue without being affected by the hue of the surroundings of the video camera.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention.

In the figure, a light ray 3 that has passed through a lens system 1 and entered a lens barrel 2 passes through a filter 4 and enters an image sensor 5. At this time, a portion of the light ray 3 is reflected and enters a color temperature detection sensor 6 placed near the image sensor 5 of the lens barrel 2 of the imaging device, and the color temperature is measured.

When the vicinity of the sensor 6 is photographed, a nearby landscape that matches the optimum color temperature around the video camera is photographed. When telephoto shooting, the scenery near the video camera is cut out by the zoom lens, only the telephoto image enters the lens, and the white balance is set based on the color temperature of that image.

〔Effect of the invention〕

As described above, the present invention has the advantage that it is possible to always measure the color temperature of the part that is actually being imaged, regardless of zoom-up, etc., and that it is possible to adjust the correct white balance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional imaging device. 1...lens system, 2...lens barrel, 3...
...ray, 4...filter, 5...
・Image sensor, 6...Color temperature detection sensor.

Claims (1)

[Claims] An imaging device used in a video camera or the like, characterized in that a color temperature detection sensor that detects the color temperature of external light is arranged around an imaging lens and an imaging element that converts light into an electrical signal. Device.