RU2596906C1 - Device for adjustment of holder of optical element - Google Patents

Abstract

FIELD: optics.

SUBSTANCE: invention relates to laser technology and a device for adjusting a holder of an optical element. Device comprises a housing fixed on a bracket, in hole of said housing of which there is an optical element, fixing elements, adjustment lock and spring. In housing there are holes for installation of fixing elements, optical element is installed in housing in a holder. Fixing elements are made in form of spring-loaded on side of bracket and fixed by cover rod and pins. Rod and pins are arranged uniformly relative to holder to interact with it. Adjustment lock used is an adhesive, which is arranged in mounting hole for holder.

EFFECT: high accuracy of adjustment subsequent fixed adjustment.

1 cl, 4 dwg

Description

The invention relates to diode-pumped solid-state lasers, in particular to structural elements of optical resonators used for initial tuning of the resonator, stabilization of the laser output parameters, and can be used in the manufacture of laser technology.

An invention is known under the name “Laser Generator” (Japanese Patent No.2010135852, IPC H01S 3/08, publ. 2010), which describes an alignment device comprising a housing, in the opening of which an optical element (reflecting a cooled mirror) is installed, and a spring. The device also contains adjusting screws, an elastic element and an elastic plate, the pressing of which occurs with a force F calculated according to a certain formula. The mirror is pressed against the housing by the side opposite the reflective surface and on the reflective surface by an elastic plate, which, when pressed on the mirror surface, changes the angle of its position.

The design of this alignment device has minimal weight and size characteristics, a simple adjustment mechanism, however, the presence of elastic elements cannot allow its use in severe operating conditions (such as shock or vibration), because their presence significantly increases the frequency of natural vibrations of the structural elements of the resonator.

The closest analogue of the invention, selected as a prototype, is a known device for adjusting the optical element frame (Chinese patent No. 2011142512, IPC H01S 3/02, 3/08, publ. 2007), containing a housing fixed to the bracket (holder) in the hole ( the central hole) of which an optical element is installed, fixing elements (bracket), adjustment lock (locking screw) and springs.

The device contains tension springs, adjusting screws, a snap ring installed in the central hole, on the front side of which an additional snap ring is installed. The housing is equipped with four holes, the lower and upper corner sections are equipped with a V-shaped groove and a recess. The housing is mounted on the bracket (holder) on the tension springs in the corresponding position. The adjusting screws are installed in the threaded holes of the bracket (holder) and abut against the spherical part in the V-groove and the recess of the housing. The adjusting screws are installed in the bracket in which the fixing screw is located, and the fixing adjustment is carried out through the threaded holes of the bracket (holder). Cone openings are located opposite each other in the body and bracket (holder) and are equipped with a common ball. The housing is equipped with four holes with grooves for the tension pins, in the bracket (holder) there are similar holes with grooves for the tension pins, in which tension springs are fixed, which are fixed with pins. The adjusting screws are screwed into the hole of the bracket, the upper part of which is made with a groove.

Four tension springs have sufficient tension force, which allows you to hold the housing relative to the bracket (holder) with a fairly uniform and stable force. The optical element is fixed in the housing opening using lock nuts with a threaded outer surface made of copper, which can guarantee not only reliable pressing, but also good heat removal from the optical element. Effective positioning is ensured by three contact points: a common ball located in the conical holes and adjusting screws, which abut against the conical hole and conical groove with their spherical surfaces. Moreover, the spherical surface of one of the adjusting screws abuts in the conical groove, the threaded surface of which is made with a smaller step, therefore, it allows for more precise adjustment. Thus, with the help of adjusting screws, it is possible to easily change the angle of the optical element in space in the two-coordinate angular range, more precise adjustment with subsequent fixation of the adjustment by the locking screws in the fixing elements (brackets) allows for reliable positioning.

This alignment device is quite accurate, allows you to fix the setting of the optical element. However, it is intended for use in laboratory conditions for high-power laser devices, it has large overall dimensions and, after adjustment, becomes a part of the structure, thus increasing its weight and dimensions.

The technical result obtained by using the proposed technical solution is the creation of a structurally detached and easy-to-use device that provides high precision alignment of the optical element with subsequent fixation settings.

The specified technical result is achieved by the fact that in the alignment device of the optical element frame containing the housing fixed to the bracket, in the opening of which the optical element is installed, the fixing elements, the alignment lock and the spring, the feature is that the housing has holes for installing the fixing elements, the optical element is mounted in a frame in the frame, the fixing elements are made in the form of a rod spring-fixed from the side of the bracket bracket, fixed by a cover, and pins, and the rod Pins are arranged uniformly in the rim to interact with it, as the alignment fastener used adhesive disposed in the bearing hole of the frame on the support part of the optical device structure along the pedestal rim.

The totality of the listed features of the alignment device provides accurate positional installation of the frame with the optical element on the bearing part of the optical device, with the possibility of its subsequent dismantling. This ensured high accuracy of alignment of the optical element and allowed us to create a structurally isolated and convenient device for operation. In this case, a decrease in the overall dimensions of the laser as a whole, as well as an increase in its resistance to external factors, is achieved.

When conducting analysis of the prior art, including a search by patent and scientific and technical sources of information, and identifying sources containing information about analogues of the invention, no analogues were found that are characterized by features identical to all the essential features of the invention. The definition from the list of identified analogues of the prototype, as the closest in the set of essential features of the analogue, allowed to identify the set of essential distinguishing features from the prototype set forth in the claims.

Therefore, the invention meets the condition of "novelty."

To verify compliance of the invention with the condition "inventive step", the applicant conducted an additional search for known solutions to identify signs that match the distinctive features of the prototype of the claimed device. As a result of the search, no technical solutions with these characteristics were identified. On this basis, we can conclude that the invention meets the condition of "inventive step".

In FIG. 1 shows a General view of the device.

In FIG. 2 - the main view.

Figure 3 is a section aa.

In FIG. 4 is a view of a frame with a mirror after dismantling the device.

The alignment device of the optical element frame includes a housing 1 (Fig. 1-3), mounted on an arm 2, which, in turn, is fixed rigidly to a standard alignment device, for example, to a two-coordinate optical table (not shown in Fig.). The housing has: a hole a for mounting a frame 3 with an optical (adjustable) element 4 (for example, a mirror) and a hole b for installing the fixing elements. The locking elements are made in the form of a rod 5, spring-loaded from the side of the bracket 2, fixed by a cover 6, and pins 7. The rod 5 and pins 7 are arranged uniformly relative to the frame 3 with the possibility of interaction with it. Pins 7 are installed on the press fit.

The device operates as follows. The frame 3 with the adjustable element 4 is fixed by the rod 5 and pins 7 in the housing 1. The force of the pressed frame is controlled by a compression spring 8, which can move along the threads on the housing 1. After that, the optical element in the frame is mounted on the supporting part of the optical device structure (for example , resonator or optical channel) into the bore hole c for the frame 3 with a gap d. An adhesive (for example, non-shrinking) is used as an adjustment lock, which is placed in the gap d along the landing part e of the frame 3.

Then, using the bracket 2, the frame 3 is aligned with the adhesive in the bore hole, for example, along the X and Y coordinates. The clearance d allows adjustment without jamming. After the adhesive has hardened, the frame 3 with the optical element 4 is completely fixed on the supporting part of the structure of the optical device.

After that, the device for adjusting the frame is dismantled and only the aligned and fixed frame 3 with the optical element 4 remains on the bearing part of the structure of the optical device (Fig. 4). When dismantling the alignment device of the optical element frame, mechanical impact on the frame fixed by glue is excluded.

This device has been repeatedly experimentally tested when tuning optical resonators, which were used to create a laser operating in conditions of external factors. According to the results of experimental studies and analysis of the obtained data, high accuracy of alignment of the optical element, laser stability to operational loads, and a decrease in its overall dimensions are confirmed.

Thus, the data presented indicate that when using the invention the following combination of conditions:

- a tool embodying the claimed device in its implementation, is intended for use in the electronic and optical-mechanical industry in the manufacture of laser devices;

- for the claimed device in the form in which it is described in the claims, the possibility of its implementation is confirmed.

Therefore, the invention meets the condition of "industrial applicability".

Claims (1)

The alignment device of the optical element’s frame contains a housing fixed to the bracket, in the hole of which an optical element is installed, fixing elements, an alignment lock and a spring, characterized in that the housing has holes for installing the fixing elements, the optical element is mounted in the frame in the frame, the fixing elements are made in the form of a rod spring-loaded from the side of the bracket, fixed by a cover, and pins, moreover, the rod and pins are arranged uniformly relative to the frame with the possibility of mutual working with it, glue placed in the landing hole for the frame on the supporting part of the optical device structure along the landing part of the frame is used as an adjustment lock;

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