JPH03259210A - Reflecting mirror supporting mechanism - Google Patents

Abstract

PURPOSE:To easily adjust the horizontal degree by providing a mechanism which adjusts the length of a reverse-surface support lever to a load shaft and the length of a flank support lever to a short arm respectively. CONSTITUTION:Nuts 14 and 17 which are clamped to an attachment 11 in a normal lever use state are clamped sufficiently to the attachment and then the beveled surface 18 of the attachment is rotated with a wrench, etc. Consequently, the male screw 13 at the lower end of the load shaft and the male screw 16 at the upper end of the load shaft vary in the quantity of engagement with the female screws 12 and 15 of the attachment to vary the overall length of the load shaft. After the levers are fitted and fixed to a cell and a reflecting mirror, the length of the load shaft is variable. Consequently, the horizontal degree of the long arm of the reverse-surface support lever 8 and the load shaft of the flank support lever can easily be adjusted after the levers are fitted and fixed to the cell and reflecting mirror and the fitting accuracy can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reflector support mechanism for supporting a reflector of a large optical telescope, and particularly relates to improvements in the lever used in the mechanism.

[Conventional technology]

FIG. 5 is a diagram showing a conventionally used supporting mechanism for a reflecting mirror.

In the figure, 1 is a reflecting mirror, 2 is a cell, and 8.9 is a unit support mechanism lever, which is classified into a back support lever 8 and a side support lever 9, depending on the surface of the mirror that the lever supports. .

Each lever is basically constructed as shown in Fig. 6. In the figure, 3 is a load shaft that supports the reflecting mirror, and 4 is a load shaft that supports the reflector.
is a short arm, 5 is a lever fulcrum, 6 is a long arm, and 7 is a weight.

In this support mechanism, the fulcrum part 5 of the lever is attached to the cell 2 that houses the reflector, and the load shaft 3 of the lever is attached to the side surface of the reflector 1 via a member.
Further, the back support lever 8 is configured to support the reflecting mirror 1 via a saucer (not shown) attached to the back surface.

Next, the operation will be explained.

When the reflector 1 faces toward the zenith as shown in FIG. 5, the weight of the reflector 10 acts only on the back support lever 8 and does not act on the side support lever 9. At this time, by appropriately adjusting in advance the weight of the weight 7 of the back support lever 8 and the length of the arm from the fulcrum 5 to the weight 7, the load shaft 3 of the back support lever 8 can be It is possible to balance the sum of the forces to the weight of the reflector l. In this way,
The reflecting mirror 1 can be held in the air only by the back support lever 8 without touching the cell 2.

Further, when the reflecting mirror 1 faces in the horizontal direction, the weight of the mirror acts only on the side support levers 9 and does not act on the back support levers 8. At this time, as in the case of the back support lever, by appropriately adjusting the weight of the weight 7 and the length of the arm from the fulcrum 5 to the weight 7, the reflector 1 is supported only by the side support lever 9. You will be able to hold it in the air.

If the levers are adjusted in the zenith and horizontal directions as described above, even when the reflector 1 faces in the middle direction between the zenith and the horizontal, the side support levers 9 and the back support levers 8 will share their duties. Thus, the reflecting mirror 1 is held in the air.

These levers are used to hold the reflector so that its relative position with the cell remains unchanged when the reflector changes its attitude relative to the direction of gravity, or to configure an optical system in which the sub-reflector is opposed to the reflector. In addition to maintaining the relative positional relationship with the sub-reflector in order to maintain the holding accuracy, the objective is to suppress the gravitational deformation that occurs on the mirror surface and prevent deterioration of the mirror's own imaging ability, which is to ensure the so-called resolution. Depending on the purpose, the lever parameters such as the weight of the weight, the length of the arm, the number of levers, and the support position on each side are appropriately selected and installed.

[Problem to be solved by the invention]

Although the levers applied to conventional reflector support mechanisms are constructed as described above, little attention has been paid to the accuracy of the attachment of the levers themselves to the reflector or cell.

However, for large reflectors that are expected to have high light-gathering ability, in addition to the conventional lever parameters, in order to ensure higher holding accuracy and resolution, the iron is supported on the back, and the long arm is supported on the side. It is necessary to specify the precision of the load shaft and the mounting of irons, and in addition to the conventional function of simply levers, there is now a need for a function that can detect and adjust the mounting precision. .

The present invention has been made in view of the above-mentioned requirements, and when it is assumed that the reflector support mechanism is set with the reflector facing the zenith, it is important to ensure higher holding accuracy and resolution. It is an object of the present invention to provide a reflector support mechanism in which the horizontality of the long arm of the back-supported lever and the load shaft of the side-supported lever can be easily adjusted.

[Means to solve the problem]

The reflector support mechanism according to the present invention includes an arm supported on a fulcrum in the unit support mechanism, a load shaft attached to one end of the arm and supporting the back and side surfaces of the reflector, and a load shaft attached to the other end of the arm. Using back and side levers consisting of attached weights, the back-supported trowel is on the load shaft, the side-supported lever is on the short arm, and a mechanism is provided to adjust the length of the load shaft and short arm, respectively. It is.

[Effect]

In the lever which is a unit support mechanism constituting the reflector support mechanism in this invention, in the back support lever, the load shaft is
The short axis of the side-supported iron is equipped with an adjustment mechanism to adjust the length of the load axis and the short axis, respectively, so after the lever is attached and fixed to the cell and reflector, the long arm of the back-supported lever can be adjusted. By supporting the trowel on its side, you can easily adjust the horizontality of the load axis when the reflector is facing the zenith.

〔Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a reflecting mirror support mechanism according to an embodiment of the present invention, FIG. ) is a diagram showing details of the configuration of the load shaft.

In the figure, the same symbols as in FIG. 5 indicate the same things, and 1
1 is the attachment, 12 is a right-handed female thread cut at the bottom of the attachment 11, 13 is the lower part of the load shaft with a right-handed male thread cut at the tip, and 14 is the load A right-handed nut is assembled into the threaded part at the bottom of the shaft and prevents relative rotation between the attachment and the bottom of the load shaft. 15 is a left-handed female thread cut into the top of the attachment, and 16 is a left-handed nut on the top of the attachment. The assembled upper part of the load shaft has a left-handed male thread at its tip. 17 is a left-handed thread for preventing rotation, which is assembled to the threaded part of the upper part of the load shaft and prevents relative rotation between the attachment and the upper part of the load shaft. The nut 18 is a chamfered portion provided approximately at the center in the axial direction of the attachment, and is composed of, for example, six surfaces similar to the side surfaces of the nut.

Next, 0 works will be explained. Here, since the operation of the lever itself is the same as that of the conventional example, it will be omitted, and only the operation of the load shaft length adjustment mechanism according to the present invention will be explained using the back support lever 8 as an example.

The length adjustment mechanism according to the present invention shown in FIG. By rotating 18 with a spanner or the like, you can change the amount of engagement of the male thread 13 at the lower end of the load shaft and the male thread 16 at the upper end of the load shaft with the female screws 12 and 15 of the attachment, respectively, thereby adjusting the overall load shaft. Since the length can be changed, the length of the load shaft can be changed after the lever is fixed to the cell and reflector, so the length of the load shaft can be changed after the lever is fixed to the cell and reflector. By changing the length, it is possible to adjust the horizontality of the long arm 6 when the reflecting mirror is oriented toward the zenith.

The case of the back support lever 8 has been explained above, but in the case of the side support lever 9, as shown in Fig. 2, by providing a length adjustment mechanism on the short arm, when the reflector is oriented toward the zenith, In figure 0, the horizontality of the load shaft 3 can be adjusted.
Reference numeral 23 indicates a lower short arm with a right-handed male thread at the tip, which is assembled to the lower part of the attachment, and 26 indicates an upper short arm, which has a left-handed male thread at the tip, which is assembled to the upper part of the attachment.

In the above embodiment, the lower and upper female threads 12 and 15 of the attachment are right-handed and left-handed, respectively, but they may also be left-handed and right-handed, respectively. In this case, the opposite oak) 14.17,
For back-supported irons, it is necessary to reverse the screws at the lower part of the load shaft and upper part 13.16, and for side-supported levers, the screws at the lower part of the short arm 23.26 must be reversed.

Furthermore, in the above embodiment, a female thread was cut in the attachment, but as shown in FIG.
There is no harm in constructing a length adjustment mechanism by cutting the male thread.

Furthermore, although not shown, it is not necessary that both the upper and lower parts of the attachment have female threads or male threads, and one may have male threads and the other may have female threads to configure the length adjustment mechanism. .

On the other hand, the back support lever is often used with the load shaft not attached and fixed to the reflector but in contact with it; in this case, the fourth
As shown, the length adjustment mechanism can be simplified. In this case, the length adjustment is performed by lifting the load shaft of the lever above the reflector and rotating the upper part of the load shaft.

In all of the above embodiments, if there is no possibility of relative rotation occurring between the male thread and the female thread, or if relative rotation is prevented from occurring by other means such as adhesive,
Rotation prevention nut 1-14. 17 can be omitted.

〔Effect of the invention〕

As described above, according to the reflecting mirror support mechanism according to the present invention, the lengths of the load axis and the short axis of the back support lever and the short arm of the side support lever that constitute the mechanism are adjusted, respectively. Since the length adjustment mechanism is provided, after the lever is fixed to the cell and reflector, the horizontality of the long arm of the back support lever and the load axis of the side support lever can be easily adjusted. This has the effect of realizing a mirror support mechanism.

[Brief explanation of drawings]

FIG. 1 is a diagram showing details of the length adjustment mechanism of the back support lever and its configuration in a reflecting mirror support mechanism according to an embodiment of the present invention, FIG. 2 is a diagram showing the length adjustment mechanism of the side support lever, and FIG. 3 and 4 are views showing a length adjustment mechanism in a reflector support mechanism according to another embodiment of the present invention, FIG. 5 is a view showing a conventional reflector support mechanism, and FIG. 6 is a view showing a conventional reflector support mechanism. It is a figure which shows the lever used for a support mechanism. In the figure, 1 is a reflector, 2 is a cell, 3 is a load shaft, 4 is a short arm, 5 is a fulcrum, 6 is a long arm, 7 is a weight, 8 is a back support lever, 9 is a side support lever, and 11 is a Attachment, 12
is a female thread or male thread provided at the bottom of the attachment, 13 is a lower part of the load shaft, 14 is a rotation prevention nut, 15 is a female thread or male thread provided at the top of the attachment,
16 is the upper part of the load shaft, 17 is the rotation prevention nut, 18 is the chamfered part of the attachment, 23 is the lower part of the short arm, and 26 is the upper part of the short arm. Note that the same reference numerals in the figures indicate the same or equivalent parts. Figure 5 Figure 2: t7/

Claims (1)

[Claims] (1) It has a plurality of unit bottom and side support mechanisms disposed on the back and side surfaces of a reflecting mirror whose attitude changes with respect to the direction of gravity, and which supports the reflecting mirror, and which allows the reflecting mirror to change its attitude. In the reflector support mechanism for holding the mirror surface so as to suppress accompanying deformation of the mirror surface, the unit back surface and unit side surface support mechanism are supported by: an arm supported on a fulcrum; A load shaft to be supported, a back and side support lever consisting of a weight attached to the other end of the arm, a load shaft of the back support lever and a short arm of the side support lever, each having the length of the load shaft and the short arm. A reflecting mirror support mechanism characterized by being provided with a length adjusting mechanism.