JP2014172137A - Cleaning device of optical mirror - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dry ice snow cleaning device which reduces the risk that a peeled contamination is reflected by, for example, a shield located near a cleaned surface and the cleaned surface is contaminated again when an optical mirror is cleaned by using a dry ice snow cleaning method.SOLUTION: A jet nozzle part 13 which blows dry ice snow 16 and a cleaner head 14 which suctions the dry ice snow 16 are located close to each other. A peeled contamination 17 is immediately suctioned with the dry ice snow 16 by the cleaner head 14.

Description

  The present invention relates to an optical mirror cleaning apparatus that employs dry ice snow cleaning as a method for cleaning a large mirror for an astronomical telescope or the like.

  Conventionally, there are a plurality of optical mirror cleaning methods. Among them, there is a dry ice snow cleaning method as one of dry cleaning methods. In the dry ice snow cleaning method, dry ice snow is generated, and the dry ice snow is sprayed on the surface to be cleaned to remove contamination on the surface to be cleaned. In the wet cleaning method, it is necessary to directly access the mirror surface, and there is a risk of damage to the mirror surface. However, in this dry ice snow cleaning method, the risk of damage to the mirror surface is small. Further, there is an advantage that the cleaning power is superior to the wet cleaning method (see, for example, Patent Document 1).

JP 2001-277116 A

  However, the dry ice snow cleaning method is a method in which the contamination is peeled off from the surface to be cleaned and blown away. Therefore, if there is a shield in the injection direction, the contamination may be reflected and reattached to the surface to be cleaned.

  The present invention has been made to prevent the above-described event, and an object of the present invention is to provide an optical mirror cleaning device that can reduce the risk that contamination once separated from the surface to be cleaned adheres again and becomes recontaminated. And

It is another object of the present invention to provide an optical mirror cleaning device that reduces the possibility of contact with a surface to be cleaned even when dry ice snow spraying and suction by a cleaner are performed alone by improving operability.

  An optical mirror cleaning device according to the present invention is an optical mirror cleaning device that cleans a mirror surface by spraying dry ice snow onto a mirror surface of the optical mirror, and includes a cleaning device that generates dry ice snow, and the cleaning device. A suction cleaner provided with a jet nozzle part having a jet nozzle for jetting the dry ice snow passing through the hose by compressed air, and a cleaner head having a suction port, provided at the tip of the attached blowing hose The spray nozzle part and the suction part are provided close to each other, and the suction port is ejected from the spray hole toward the mirror surface of the optical mirror, and dry ice snow from which contamination has been peeled off from the mirror surface; Inhale the contamination.

According to the optical mirror cleaning device of the present invention, recontamination due to reflection on the shielding object can be prevented even when the shielding object is present in the dry ice snow injection direction.

It is a block diagram which shows the washing | cleaning apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the state from which the dry ice snow was sprayed on the to-be-cleaned surface by the washing | cleaning apparatus which concerns on Embodiment 1 of this invention, and the contamination was removed. It is a block diagram which shows the washing | cleaning apparatus which concerns on Embodiment 2, 3 of this invention. It is a figure which shows the state from which the dry ice snow was sprayed on the to-be-cleaned surface by the washing | cleaning apparatus of Embodiment 2 of this invention, and the contamination was removed. It is a figure which shows the state from which the dry ice snow was sprayed on the to-be-cleaned surface by the washing | cleaning apparatus of Embodiment 3 of this invention, and the contamination was removed.

Embodiment 1.
FIG. 1 is a configuration diagram showing an optical mirror cleaning device 100 according to Embodiment 1 of the present invention.
The optical mirror cleaning device 100 includes a cleaning device 11 connected to a compressor 15, an injection nozzle unit 13 provided at the tip of a hose 22 extending from the cleaning device 11, a suction cleaner 12, and a suction cleaner 12. It is comprised from the cleaner head 14 provided in the front-end | tip of the hose 23 extended. The injection nozzle unit 13 includes a nozzle 21 and an injection port 20 at the nozzle tip.
The cleaning device 11 generates dry ice snow by expanding and cooling a pressurized liquefied carbon dioxide gas (not shown), for example. The dry ice snow generated in the cleaning device 11 passes through the hose 22 extending from the cleaning device 11 together with the compressed air compressed by the compressor 15 and is ejected from the tip of the nozzle 13.
On the other hand, the suction cleaner 12 sucks air from the suction port of the cleaner head 14 via the hose 23.

FIG. 2 is a view showing a state where the dry ice snow is sprayed onto the surface to be cleaned 19 and the contamination is removed by the optical mirror cleaning device of the present embodiment.
As shown in FIG. 2, the cleaner head 14 is disposed in the vicinity of the spray nozzle portion 13.
The dry ice snow 16 sprayed from the spray nozzle unit 13 is directed to the contamination 17 of the surface to be cleaned 19, and the dry ice snow 16 sprayed from the spray nozzle unit 13 collides with the contamination 17, and the contamination 17 is covered. Peel from the cleaning surface 19.

The contamination 17 peeled from the surface to be cleaned 19 is sucked by the cleaner head 14 together with the dry ice snow 16.

As described above, the optical mirror cleaning apparatus according to the present embodiment is provided with the suction type cleaner 12, and the contamination 17 separated from the surface to be cleaned 19 is cleaned with the dry ice snow 16 and the cleaner head 14 in the vicinity of the spray nozzle portion 13. Sucked into.
Therefore, even if there is a structure around the surface to be cleaned 19, the peeled contamination 17 can be sucked before reflection by the structure, and recontamination can be prevented.

  Needless to say, the surface to be cleaned is effective even if it is made of a metal such as aluminum or silver, a protective coat, or an insulator / oxide multilayer coating.

Embodiment 2.
In the optical mirror cleaning apparatus of the first embodiment, when the area of the surface to be cleaned becomes large, it is necessary to extend the spray nozzle and the cleaner head in order to remove contamination at the center. When working alone, it is necessary to handle both the spray nozzle part and the cleaner head with one hand, which leads to an unstable state. Therefore, it is conceivable that the possibility of damage due to contact of the spray nozzle or the cleaner head with the surface to be cleaned is increased. In the second embodiment, a description will be given of a cleaning device that makes it difficult for an injection nozzle or a cleaner head to come into contact with a surface to be cleaned even when the area of the surface to be cleaned becomes large.

FIG. 3 is a block diagram showing an optical mirror cleaning apparatus according to Embodiment 2 of the present invention.
Although the components are the same as those in the first embodiment described with reference to FIG. 1, in the second embodiment, the injection nozzle unit 13 and the cleaner head 14 are fixed and integrated.

FIG. 4 is a diagram showing a state where the dry ice snow is sprayed onto the surface to be cleaned and the contamination is removed by the optical mirror cleaning device according to the second embodiment.
In FIG. 4, the spray nozzle portion 13 and the cleaner head 14 are fixed, and the tip of the spray nozzle portion 13 made longer than the cleaner head 14 is bent in the direction toward the suction port of the cleaner head 14. is there.
The position of the cleaner head 14 is adjusted so that the peeled contamination 17 is sucked together with the dry ice snow 16 by the cleaner head 14.

In the optical mirror cleaning apparatus configured as described above, since the injection nozzle unit and the cleaner head can be handled with both hands, the stability of the operation is increased.
Thereby, the possibility of damage due to contact of the spray nozzle or the cleaner head with the surface to be cleaned can be reduced.

Embodiment 3.
FIG. 5 is a diagram showing a state where the dry ice snow is sprayed onto the surface to be cleaned and the contamination is removed by the optical mirror cleaning device according to the third embodiment. The configuration of the optical mirror cleaning device according to the third embodiment is the same as that of the optical mirror cleaning device according to the second embodiment of FIG.
In the optical mirror cleaning device according to the third embodiment, the method of bending the spray nozzle portion 13 is changed so that the dry ice snow 16 can be sprayed perpendicularly to the surface to be cleaned 19.

In this embodiment, since the optical mirror can be cleaned in a more local space, it is possible to clean every corner even when a structure exists near the surface to be cleaned.

DESCRIPTION OF SYMBOLS 11 Cleaning apparatus, 12 Suction type cleaner, 13 Spray nozzle part, 14 Cleaner head, 15 Compressor, 16 Dry ice snow, 17 Contamination, 18 Suction port, 19 Surface to be cleaned, 20 Spray port, 21 Nozzle, 22, 23 Hose , 100 Optical mirror cleaning device.

Claims (4)

An optical mirror cleaning device for cleaning a mirror surface by spraying dry ice snow on the mirror surface of the optical mirror,
A cleaning device for generating dry ice snow;
An injection nozzle portion provided at the tip of a blowing hose attached to the cleaning device, and having a jet nozzle for jetting the dry ice snow passing through the hose by compressed air;
A suction cleaner with a cleaner head having a suction port;
With
The spray nozzle part and the suction part are provided close to each other,
2. The optical mirror cleaning apparatus according to claim 1, wherein the suction port sucks the dry ice snow, which is ejected from the ejection port toward the mirror surface of the optical mirror and peels the contamination from the mirror surface, and the contamination. The spray nozzle portion and the cleaner head are fixed integrally,
2. The optical mirror cleaning device according to claim 1, wherein the spray nozzle portion is bent in the middle of the nozzles constituting the spray nozzle portion, and the spray port faces a direction in which the suction port faces. The spray nozzle portion and the cleaner head are fixed integrally,
2. The optical mirror cleaning device according to claim 1, wherein the ejection port and the suction port face the same direction. The mirror surface of the optical mirror is composed of a multilayer coating of an oxide and an insulator, composed of aluminum and a protective coat, or composed of silver and a protective coat. Or an optical mirror cleaning device.

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