JPH031605B2 - - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device that makes it possible to measure the light intensity of a part or the whole of an ultraviolet image.

(Description of Prior Art) There is a strong desire to quantitatively observe the intensity of a specific portion or the entire ultraviolet image.

If it were possible to accurately measure the intensity of the ultraviolet component contained in Thielenkov light, it would be possible to quantify the amount of charged particles contributing to the emission. If we can quantify the amount of charged particles, we can know how much nuclear fuel activation is progressing. This allows the degree of activation of nuclear fuel deeply submerged in a storage pool (7 meters deep) to be easily measured from a distance and without contact.

Furthermore, if the ultraviolet rays generated by the discharge can be measured together with the overall image, the build-up of the discharge can be quantified.

When observing living cells, it is possible to selectively attach a special reagent (ultraviolet fluorescence) to cancer cells and confirm their location. Therefore, if the luminescence can be quantified, the progress of the cancer can be determined.

An example of a conventional ultraviolet image observation device will be explained with reference to FIG.

The image emitted by the object 1 is focused by the objective lens 2 on the photocathode 5 of the ultraviolet image intensifier 3 and converted into a photoelectron image. This photoelectron image is focused on a microchannel plate 7 by an electron lens 6 and multiplied. The output image is converted into an optical image again by the phosphor screen 8. An observer can observe this optical image through an eyepiece.

FIG. 2 is a diagram showing an example of the configuration of still another ultraviolet image observation device. The configuration shown in FIG. 2 is used to measure the intensity of ultraviolet light.

The ultraviolet rays from the object 1 are split by a half mirror 19 in front of the ultraviolet image intensifier 3, one side passes through a reflection mirror 20 and an aperture 21, and is made incident on a photomultiplier tube 22, where the multiplied output is subjected to signal processing. circuit 2
3 and displayed on the display 24.

The ultraviolet image intensifier 3 is provided to confirm the object 1.

Although the apparatus shown in FIG. 1 is suitable for observing the entire image, it is not suitable for quantifying the intensity of ultraviolet light. The device shown in FIG. 2 is capable of both observing the entire image and quantifying the intensity, but there is a problem in that the weak ultraviolet rays are divided by a half mirror.

(Object of the invention) This invention is an ultraviolet intensity measurement method that sufficiently intensifies an ultraviolet image and then divides it into an observation system and a measurement system, so that the intensity of ultraviolet rays at any part within the field of view of the observation system can be measured. The goal is to provide equipment.

(Structure and operation) In order to achieve the above object, an ultraviolet image intensity measuring device according to the present invention includes an ultraviolet image intensifier, an objective lens for forming an ultraviolet image on a light source surface of the ultraviolet image intensifier, and an ultraviolet image intensifier. a light splitting device that splits an output image of the light, and an eyepiece system that generates an index within a field of view and observes one of the split light images.
a photodetector, a photodetector lens system for forming the other of the split light images on the photodetector, and a circuit for displaying the output of the photodetector, within the field of view of the eyepiece lens system. is configured to measure the intensity of ultraviolet light.

According to the above configuration, the observer can simultaneously measure the intensity of the ultraviolet rays of the image within the field of view while observing the ultraviolet image.

(Example) The present invention will be described in more detail below with reference to the drawings and the like.

FIG. 3 is a block diagram showing an embodiment of the ultraviolet image intensity measuring device according to the present invention.

An ultraviolet image generated by the object 1 is formed by an objective lens 2 on a photocathode of an ultraviolet image intensifier 3. The structure and operation of the ultraviolet image intensifier 3 are the same as described above with reference to FIG.

The output image multiplied by the ultraviolet image intensifier 3 and converted into visible light is divided by a half mirror 9, and one part is observed through an eyepiece. It is configured so that an index Ret (Reticle) appears within the field of view so that the observer can specify a specific position of the image and measure the intensity of the image at that part.

The other light divided by the half mirror 9 is imaged by a lens 10 onto a photodetector 11. It is not necessary that all images of the ultraviolet image intensifier 3 are projected onto the photodetector 11.

In this embodiment, light from the central portion of the output image of the ultraviolet image intensifier 3 corresponding to the portion indicated by the index Ret within the field of view is received and converted into an electrical signal.

This signal is amplified by amplifier 12. The output of this amplifier 12 is connected to an A/D converter 13. When the observer operates the switch, the control circuit 16
causes the A/D converter 13 to convert the output of the amplifier 13 at that time into a digital value, and causes the sample and hold circuit 14 to sample and hold the converted digital value.

This content is displayed on the display 15. This display is updated by the next switch operation.

(Effects of the Invention) As explained in detail above, the apparatus according to the present invention is configured to multiply an ultraviolet image using an ultraviolet image intensifier, convert it into a visible image, and then divide it into visible images. It has now become possible to measure weak ultraviolet images.

Since there is a correspondence between the field of view of the eyepiece system and the part of the image that the detector receives, the user can select part or all of the image and measure the intensity of the ultraviolet rays that cause that image. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional ultraviolet image observation device. FIG. 2 is a block diagram showing another example of a conventional ultraviolet image observation device. FIG. 3 is a block diagram showing an embodiment of the apparatus according to the invention. 1...Object (ultraviolet ray generation source), 2...Objective lens, 3...Ultraviolet image intensifier, 5...Photocathode, 6
...electronic lens, 7...microchannel plate, 8...fluorescent screen, 19...half mirror, 2
0...Reflection mirror, 21...Aperture, 22...Photomultiplier tube, 23...Signal processing circuit, 24...Display device.

Claims (1)

[Scope of Claims] 1. an ultraviolet image intensifier, an objective lens for forming an ultraviolet image on a light source surface of the ultraviolet image intensifier, and a light splitting device for dividing an output image of the ultraviolet image intensifier;
an eyepiece lens system that generates an index within a field of view and observes one of the split light images; a photodetector; and a photodetector lens that forms the other of the split light images on the photodetector. an ultraviolet light intensity measuring device, the ultraviolet light intensity measuring device having a circuit for displaying the output of the photodetector, and configured to measure the intensity of ultraviolet light that causes an image appearing within the field of view of the eyepiece system. 2. Claim 1, wherein the circuit for displaying the output of the photodetector is formed so as to fix and display the intensity of the light incident on the photodetector at that time through manual operation by an observer. The ultraviolet image intensity measuring device described.