JPH0323617Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial field of application) This invention relates to a curved reflector for optical instruments. Specifically, the purpose of this invention is to ensure the safety of workers when installing the curved reflector, and to
It is an object of the present invention to provide a curved reflecting mirror in an optical instrument that can be easily and accurately attached to an optical instrument by aligning the optical axis of the optical instrument with the optical axis of the curved reflecting mirror.

(Background of the invention) Today, optical instruments are widely used in various industries as lighting instruments such as spot lights and searchlights, and inspection instruments such as microscopes and fiberscopes.

Most of these optical instruments reflect the light rays emitted from a light source with a curved reflecting mirror, and condense the reflected light with a lens. The light beam must be focused extremely precisely onto a small area of the light incident end face of the device.

In such an optical instrument, not only precision is required in the molding of the curved reflecting mirror, but also precision in adjusting the optical axis of the curved reflecting mirror when it is installed.

(Prior Art and its Problems) Conventionally, as shown in FIG. 6, in an optical instrument, an annular fitting flange c is attached to an annular fixing frame a fixed to an optical instrument body via a mounting bolt b. The opening edge f of the irradiation aperture e of the curved reflector d is fitted into the fitting flange c, and the curved reflector d is fixed.
is attached, and this curved reflecting mirror d is provided with an insertion hole g opposite to the irradiation aperture e, and this insertion hole g
A light source lamp h such as a xenon lamp is inserted into the curved reflector d, and a lens j having an optical axis i passing through the center of the light source h is arranged in front of the irradiation aperture e of the curved reflector d. Further, a light entrance end face l of an optical fiber k is disposed at the lens focal position in front of this lens j.

In such conventional optical instruments, it is necessary to reflect the light rays generated from the light source lamp h on the inner surface of the curved reflector d, and to accurately focus the reflected rays on the light entrance end surface l of the optical fiber k using the lens j. ing.

In order to accurately condense the reflected light beam, it is essential that the optical axis m of the curved reflecting mirror d be precisely aligned with the optical axis i of the lens j.

Incidentally, the curved reflecting mirror d is attached to the fixed frame a by fixing the fitting flange c fitted to the opening edge f of the curved reflecting mirror d to the fixed frame a.

This is based on the premise that the aperture end face of the aperture edge f of the curved reflector d is exactly perpendicular to the optical axis m, and if the aperture end face n is set parallel to the fixed frame a, the light of the curved reflector d This is based on the technical idea that the axis m coincides with the optical axis i of the lens j.

However, in reality, the accuracy of the curved reflector d is influenced by the accuracy of molding, the thermal expansion and contraction of the material, the skill level of the molding worker, etc.
It is extremely difficult to mold the mirror so that it intersects exactly perpendicular to the optical axis m, and in fact, in almost all curved reflecting mirrors d, the aperture end face n does not intersect exactly perpendicularly to the optical axis m.

Moreover, the method of polishing and restoring the shape to its normal shape, which is normally done for lenses, cannot be used because the mirror surface of the curved reflector d is thin, and the shape of the poorly formed curved reflector d cannot be used to restore the shape to its normal shape. There was no effective way to fix it.

Therefore, when such a curved reflector d is attached to the fixed frame a by the fitting flange c, the curved reflector d
Since the optical axis m of does not coincide with the optical axis i of lens j,
Some adjustment will be required.

In this case, since the curved reflector d is fixedly attached, it is necessary to tilt the light source h.

This kind of adjustment work requires delicate operations by inserting hands or instruments into the narrow curved reflector d, so adjustments can only be made by an experienced person, and furthermore, the light source lamp h filled with high-pressure gas must be handled directly. Therefore, workers should always be aware of the dangers caused by the explosion of the light source lamp h.
There was a risk of burns due to the heat generated.

In addition, Japanese Patent Application Laid-Open No. 54-3683, ``A method and device for fine adjustment using both automatic and manual methods that do not interfere with each other,'' discloses a technology for searchlights for ships, etc. that adjusts the optical axis by moving the light source. No. 15-2519, "Reflector Adjustment Device for Floodlight," fixes the reflection and light source to the main part of the optical instrument body, the drum, and then adjusts the main part of the optical instrument body, the drum, to adjust the reflection. A technique for a reflector adjustment device that adjusts the optical axis of a device is disclosed.

However, the former technique of adjusting the optical axis by moving the light source is difficult to put into practical use in lighting equipment such as spot lights and searchlights, and inspection instruments such as microscopes and fiberscopes, and the latter technique The technique of adjusting the optical axis by adjusting the drum, which is the main part of the optical instrument body, is also a technique of adjusting the optical axis after installing the optical instrument body, so the optical axis adjustment is complicated and requires skill. However, it was not practical.

(Means for Solving the Problem) This invention was made in order to solve the above problem, and it is a curved reflecting mirror for an optical instrument, and the curved reflecting mirror is provided with an insertion hole opposite to the irradiation aperture. A light source lamp is inserted into the curved reflector through this insertion hole, and a fitting flange is fitted to the periphery of the irradiation opening of the curved reflector, and this fitting flange is fitted with at least three adjustment bolts. It is integrated with the mounting frame, and in this state, use the adjustment bolt to align the optical axis of the curved reflector with the optical axis of the light source.
In this matched state, the positional relationship between the light source lamp, the curved reflector, and the mounting frame is fixed, and in this fixed state, the mounting frame and the fixed frame fixed to the optical instrument body are fixed via the mounting bolts. By providing a curved reflecting mirror in an optical instrument, all of the above problems are solved.

(Example) An example of the use of an optical instrument using an example of the invention and a curved reflecting mirror according to the example will be described based on the drawings.

FIGS. 1 to 5 are diagrams for explaining a curved reflecting mirror in an optical instrument according to an embodiment of the invention and how the curved reflecting mirror is used.

As shown in Fig. 3, 1 is a spotlight which is a type of optical instrument;
A rectangular cylindrical casing 3 is supported laterally on a stand 2, and inside the casing 3, a light source section 4 is housed in the rear half and an irradiation section 5 is housed in the front half.

In this embodiment, the light source section 4 is connected to the casing 3
An annular fixed frame 6 fixed to the inner bottom surface of the frame, a curved reflecting mirror 8 having a mounting bracket 7 attached to the fixed frame 6 and mounted via the mounting bracket 7, and a curved reflecting mirror 8 disposed inside the curved reflecting mirror 8. It is mainly composed of a xenon lamp 9 as a light source lamp.

As shown in FIGS. 1 and 2, the main body of the curved reflecting mirror 8 has a reflecting surface shaped like a paraboloid, and has a perfect circular irradiation aperture 11 centered on the optical axis 10 on the front surface.
A perfect circular insertion hole 1 centered on the optical axis 10 on the rear surface
0' are each opened.

The mounting bracket 7 has a mounting bolt 1 attached to the front of the fixed frame 6.
an annular mounting frame 13 attached via 2;
It consists of an annular fitting flange 15 fitted into the aperture line portion 14 of the irradiation aperture 11 of the curved reflector 8, and four adjustment bolts 16 for attaching the fitting flange 15 to the mounting frame 13. The base end of the adjusting bolt 16 is threadedly inserted into a fixing nut 17 welded to the four sides of the back surface of the fitting flange 15, and the tip of the adjusting bolt 16 is screwed into the surface of the mounting frame 13 at right angles.

In this embodiment, the number of adjustment bolts 16 is 4.
The adjustment bolts 16 used here are integrated by screwing together the fitting flange 15 and the mounting frame 13, and each adjustment bolt 16 is screwed together using a preliminary processing method that will be described in detail later. By adjusting the depth, the installation angle of the curved reflector 8 can be adjusted, and the optical axis of the curved reflector 8 and the optical axis of the xenon lamp 9 can be made to coincide, so if there are at least three good.

Further, the fitting flange 15 is attached to the mounting frame 13 by welding or the like after adjusting the angle so that the optical axis of the curved reflector 8 and the optical axis of the xenon lamp 9 are aligned with each other with the adjustment bolt 16 and the focal point is on the optical axis. Fixed.

As described above, the curved reflector according to the present invention is manufactured by adjusting the threading depth of the adjusting bolts 16 and aligning the optical axis of the curved reflector 8 with the optical axis of the xenon lamp 9. The mirror 8, the mounting frame 13, and the xenon lamp 9 are fixed in position.

The xenon lamp 9 is inserted laterally through an insertion hole 10' on the back surface of the curved reflector 8 and is disposed inside the curved reflector 8.

In this embodiment, the irradiation section 5 mainly includes a rear zoom lens 18 disposed in front of the light source section 4 and a front zoom lens 19 disposed further in front of the rear zoom lens 18, as shown in FIG.

Each optical axis 2 of the front and rear zoom lenses 18 and 19
0, 21, the optical axis 10 of the curved reflecting mirror 8, and the central axis 22 of the xenon lamp 9 are easily aligned with each other.

In the figure, 23 is a lighting push button, 24, 25, and 26 are knobs for vertical, horizontal, and front/back adjustment of the xenon lamp 9, respectively, 27 is a lead wire, and 2
8 is a mounting groove, 29 is a collar changer, 30 is a stand leg, 31 is a caster, 32 is a fixing knob, 33 is a stand rod, 34 is a stand holder, 3
5 is a cooling fan, and 36 is a side door.

An embodiment and an example of use of this invention are constructed as described above. In the spotlight 1 according to this embodiment, when the xenon lamp 9 is turned on, the light rays generated from the xenon lamp 9 are directed to the curved reflecting mirror 8.
The reflected light beam is irradiated forward through the front and rear zoom lenses 19 and the color changer 29.

For example, if the curved reflector 8 is accidentally damaged and needs to be replaced, first remove only the mounting bolts 12 from the fixing frame 6 and remove the curved reflector 8 together with the mounting bracket 7 and the like.

Next, a new integral curved reflecting mirror 8 body may be replaced.

Conventionally, the mounting bracket 7 was attached to the irradiation aperture 11 of the curved reflector 8 to replace it, but the irradiation aperture 11 did not intersect exactly perpendicular to the optical axis 10 due to molding errors, etc. When attached to the optical axis 10, the optical axis 2 of the front and rear zoom lenses 19 and
Since the optical axis was deviated from 0.0 and 21, the optical axis was adjusted while being attached to the fixed frame 6, which caused the problem as described above.

However, the curved reflector according to this invention,
Since the optical axis has been adjusted in advance, it can be easily replaced.

Optical axis adjustment as a preliminary process in this invention is performed using an optical axis adjuster 37 as shown in FIG.

The optical axis adjuster 37 includes a base 39 containing a vertical motor 38, a box-shaped rotary table 40 rotatably placed on the base 39, and a box-shaped rotary table 40 that is rotatably placed on the base 39.
It is composed of a screen 41 disposed above.

The rotary table 40 has a light source 43 erected on the rotation center axis 42 on the inner bottom surface, and a fitting opening 45 centered on the rotation center axis 42 is formed in the top surface 44, and a bolt is inserted into the periphery of the fitting opening 45. Hole 4
6 is formed.

The screen 41 is disposed parallel to the upper surface 44 of the rotating table 40, and a mark centered on the rotation center axis 42 is marked on the lower surface of the screen 41.

In the optical axis adjuster 37 having the above configuration, the curved reflector 8 equipped with the mounting bracket 7 is inserted into the rotary base 40 through the insertion opening 45 of the rotary base 40, and the light source 43 is inserted through the insertion hole 12 of the curved reflector 8. is inserted into the curved reflecting mirror 8, and the mounting bolts 12 of the mounting frame 13 are fitted into the bolt insertion holes 45 to support the curved reflecting mirror 8 on the rotary table 40.

Next, the light source 43 is turned on, the light beam from the light source 43 is reflected by the inner surface of the curved reflecting mirror 8, and the rotating table 40 is irradiated with the reflected light beam to the lower surface of the screen 41.
Rotate.

If the spot illuminated on the lower surface of the screen 41 is shifted from the mark on the screen 41, adjust the mounting angle of the curved reflector 8 together with the fitting flange 15 by operating the four adjusting bolts 16, respectively, and adjust the spot. When the optical axis 10 of the curved reflecting mirror 8 is aligned with the mark on the screen 41, the optical axis 10 of the curved reflecting mirror 8 is aligned with the optical axis of the light source 43.

Next, the mounting frame 13 and the fitting flange 15 are fixed together by welding or the like, thereby fixing the curved reflector 8 and the mounting frame 13.

The optical axis of the curved reflector 8 can be adjusted by simply attaching the mounting frame 13 to the fixed frame 6. 10 coincides with the optical axes 20 and 21 of the front and rear zoom lenses 19 and 18 and the central axis 22 of the xenon lamp 9.

As described above, the curved reflector according to an embodiment of the present invention has a curved reflector 8 in which the aperture surface of the irradiation aperture 11 of the curved reflector 8 body does not intersect perpendicularly with the optical axis 10.
By adjusting the adjustment bolt 16, the curved reflector 8
Before attaching the lens to the fixed frame 6, the optical axis 10 is already aligned with the optical axes 20, 21 of the front and rear zoom lenses 19, 18.

Therefore, there is no need to adjust the optical axis after attaching the curved reflector 8 to the fixed frame 6 fixed to the optical instrument body, and delicate operations are performed by inserting a hand or an instrument into the narrow reflector as in the conventional case. Since this is not necessary, the curved reflector 8 can be easily and accurately replaced even by non-experts, and there is no danger of danger or burns caused by the explosion of the xenon lamp 9 filled with high-pressure gas, and worker safety is ensured. .

(Effects) As explained above, this invention is a curved reflector for optical instruments, in which an insertion hole is provided opposite to the irradiation opening, and a light source lamp is inserted into the curved reflector through the insertion hole. is inserted, a fitting flange is fitted to the periphery of the irradiation opening of the curved reflector,
This fitting flange is integrated with the mounting frame by screwing at least three or more adjustment bolts, and in this state, the optical axis of the curved reflector and the optical axis of the light source are aligned using the adjustment bolts, and the optical axis of the light source lamp is aligned. The optical instrument is characterized in that the positional relationship between the light source lamp, the curved reflector, and the mounting frame is fixed in this fixed state, and in this fixed state, the mounting frame and the fixed frame fixed to the optical instrument body are fixed via mounting bolts. Since this is a curved reflector used in optical instruments, it is necessary to adjust the curved reflector whose irradiation aperture is not perpendicular to the optical axis by adjusting the adjustment bolt in advance. The curved reflector is fixed to the optical instrument body after the optical axis is aligned with the optical axis of the light source lamp, so there is no need to adjust the optical axis after attaching the curved reflector to the optical instrument body as in the conventional method. There is no need to insert hands or instruments into the narrow reflector to perform delicate operations, so even non-experts can easily and accurately replace the curved reflector, and workers can easily and accurately replace the light source filled with high-pressure gas. The safety of workers is ensured because they are not exposed to the dangers of explosions and burns caused by lights.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional side view of the main part of a curved reflector according to an embodiment of this invention, Fig. 2 is a front view of the main part of the device in the same state of use, and Fig. 3 is a longitudinal cross-section of the device in the same state of use. 4 is a side view of the entire device in the same state of use, FIG. 5 is a diagram illustrating optical axis adjustment of the curved reflector according to this invention, and FIG. 6 is a diagram illustrating a conventional example. 1...Spotlight, 6...Fixed frame, 8...
Curved reflector, 9...xenon lamp, 11...irradiation aperture, 11'...insertion hole, 12...mounting bolt,
13... Mounting frame, 14... Opening edge, 15... Fitting flange.

Claims (1)

[Scope of utility model registration request] A curved reflector in an optical instrument, in which an insertion hole is provided opposite to the irradiation aperture, a light source lamp is inserted into the curved reflector through the insertion hole, and the periphery of the irradiation aperture of the curved reflector is A fitting flange is fitted to the part, and this fitting flange is integrated with the mounting frame by screwing at least three adjusting bolts, and in this state, the adjusting bolts are used to adjust the optical axis of the curved reflector and the light source lamp. In this matched state, the positional relationship between the light source lamp, curved reflector, and mounting frame is fixed, and in this fixed state, the fixed frame is fixed to the mounting frame and the optical instrument body via the mounting bolts. A curved reflector for an optical instrument, characterized in that it is formed by fixing and.