CN210154567U

CN210154567U - Hollow metal pyramid

Info

Publication number: CN210154567U
Application number: CN201921421113.3U
Authority: CN
Inventors: 景洪伟
Original assignee: Sichuan Lamuda Science And Technology Co Ltd
Current assignee: Sichuan Lamuda Science And Technology Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-03-17
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a hollow metal pyramid, which comprises a hollow pyramid and a base, wherein the hollow pyramid consists of three lenses with equal size and reflecting surfaces, and one right-angle side of one lens is glued with the reflecting surface of the other lens; the lens is in a right-angled triangle shape, a square shape or a right-angled fan shape; each lens is provided with an extension part, the extension part extends from a right angle, and the extension part and the back surface of the reflecting surface form an angle which is larger than 90 degrees and smaller than 180 degrees; the three lenses are mutually vertical in pairs, after the lenses are mutually vertically combined, the extending parts of the three lenses are parallelly and tightly close to form a cylinder to form an extending group, and the extending group is provided with external threads; a retaining sleeve having internal threads is provided, the internal threads of which mate with the threads of the extension set. The vertical angle between the lenses can be better fixed by limiting the extension group by the fixing sleeve, thereby reducing the angle error.

Description

Hollow metal pyramid

Technical Field

The utility model relates to an optical measurement part, concretely relates to hollow metal pyramid.

Background

As is well known, in conventional optical distance measuring instruments, the pyramid is a standard fitting. Pyramids are used primarily to keep incident light parallel to outgoing light, and the degree of non-parallelism is the most important indicator of a pyramid, which may be in minutes or seconds (degrees). The common pyramid is solid and has three polished faces perpendicular to each other, the perpendicular 90 ° angle needs to be very precise, and the total reflection property of the optical material is used to realize the parallel incidence and exit of light, but the incidence and exit are accompanied by the refraction process. Because the requirement that three faces of the solid pyramid are perpendicular to each other is high, the processing and manufacturing difficulty of the solid pyramid is higher.

Hollow pyramid has certain degree of difficulty at the in-process of sticky lens, need ensure that the position is accurate, ensures its angle accuracy, the utility model discloses utilize the lens to extend partly to come out as the fixed stay to reach the precision of guaranteeing the angle.

SUMMERY OF THE UTILITY MODEL

The utility model provides a prior art exist when the three mirror surface of pyramid that splices, the problem of the mutually perpendicular state between the holding lens that can not be good.

The utility model discloses a following technical scheme realizes:

a hollow metal pyramid, which comprises a hollow pyramid and a base,

the hollow pyramid consists of three lenses with equal size and reflecting surfaces, and the rough edge of each lens is glued with the mirror surface of the other lens;

the shape of the lens is a figure with at least one right angle; each lens is provided with an extension part, the extension part extends from a right angle, and the extension part and the back surface of the reflecting surface form an angle which is larger than 90 degrees and smaller than 180 degrees;

every two of the three lenses are mutually vertical, after the lenses are mutually vertically combined, the extending parts of the three lenses are parallelly and tightly close to form a cylinder to form an extending group, and the extending group is provided with external threads; a retaining sleeve having internal threads is provided, the internal threads of which mate with the threads of the extension set.

Firstly, the pyramid adopts a hollow structure, so that the influence caused by material absorption and dispersion is effectively avoided, and the weight is reduced; the lens is designed to have at least one right-angled figure, the extending part extends from the right angle, the extending part and the non-reflecting surface form an angle which is larger than 90 degrees and smaller than 180 degrees, so that the three extending parts can be abutted in parallel after the lens surfaces are mutually perpendicular, the three extending parts are combined together to form a cylinder, the cylinder is provided with a thread, the cylinder is provided with a fixing sleeve with an internal thread, the internal thread of the fixing sleeve is matched with the thread on the extending parts, the vertical relation between the lenses is fixed through the fixing sleeve, and the wafers cannot move after being mutually perpendicular so that the angle is deviated. Gluing between the lenses is carried out after the positions are fixed, so that the burden of gluing is reduced, and the angles between the surfaces are accurate enough.

The reflecting surface of the hollow pyramid is a quartz mirror with the thickness of 1 mm.

The base is made of metal materials.

The angle error between the right angles of the hollow pyramid is less than or equal to 5'.

The hollow pyramid and the base are combined by gluing.

The surface shape error of the hollow pyramid is not more than lambda/4.

The reflectivity of the hollow pyramid is more than or equal to 90 percent.

The base is a hollow cylinder.

The shape of the lens is a right-angle fan shape, a right-angle triangle or a square.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

compared with a solid pyramid, the hollow pyramid has the advantages that the weight is reduced, and the influence caused by material absorption and dispersion is effectively avoided;

compared with the film coating in the prior art, the hollow pyramid lens adopts the quartz lens, so that the service life of the pyramid is prolonged, and the cleaning is easier;

the extension part is added in the design of the lens, so that the difficulty of fixing the position of the lens combination is reduced, and the angle error is more effectively reduced;

the base of pyramid adopts cylindrically, and effectual fixed pyramid effectively reduces the pyramid and receives undulant in using.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic view of the whole pyramid.

FIG. 2 pyramid top view

FIG. 3 is a schematic view of a lens shape

FIG. 4 lens extension junction and mounting sleeve position

FIG. 5 is a perspective view showing the relationship between the extension set and the fixing sleeve

Reference numbers and corresponding part names in the drawings:

1-hollow pyramid

2-base

3-lens

4-fixing sleeve

5-extension of a protein

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

The first embodiment is as follows:

as shown in fig. 1, a hollow metal pyramid comprises a hollow pyramid 1 and a base 2, wherein the hollow pyramid 1 consists of three equal lenses 3 with reflecting surfaces, and the rough edge of each lens 3 is glued with the mirror surface of the other lens 3; the shape of the lens 3 is a right-angle sector; as shown in fig. 3, each lens 3 has an extension 5 extending from a right angle, the extension 5 forming an angle greater than 90 degrees and less than 180 degrees with the rear surface of the reflecting surface;

every two of the three lenses 3 are mutually vertical, after the lenses 3 are mutually vertical and combined, the extending parts 5 of the three lenses 3 are close together in parallel to form a cylinder to form an extending group, and the extending group is provided with external threads; there is a fixed sleeve 4 with internal screw thread, whose internal screw thread matches with the screw thread on the extension set.

As can be seen from FIG. 4, the lens 3 is designed into a right-angled fan shape, the extension portion 5 extends from the right angle, the extension portion 5 and the non-reflective surface form an angle larger than 90 degrees and smaller than 180 degrees, so that the three extension portions 5 can be closely and parallelly arranged after the mirror surfaces are mutually perpendicular, the three extension portions 5 are combined to form a cylinder, the cylinder is provided with a thread, and a fixing sleeve 4 with an internal thread is arranged, the internal thread of the fixing sleeve 4 is matched with the thread on the extension portion, and the vertical relation between the lenses is fixed through the fixing sleeve 4, so that the lenses 3 cannot move to cause angle deviation after being mutually perpendicular. Gluing between the lenses is carried out after the position is fixed, the burden of gluing is reduced, and the angle between the surfaces is accurate enough, so that the angle error is reduced.

Example two:

on the basis of the above embodiment, the present embodiment: the pyramid adopts a hollow structure, so that the influence caused by material absorption and dispersion is effectively avoided, and the weight is reduced; hollow pyramid 1's lens 3 adopts the quartz mirror, and thickness is 1mm, can effectively reduce the shape of face error, and the shape of face error is for being less than or equal to lambda 4 for hollow pyramid 1's measurement accuracy is higher, and the reflectivity is greater than or equal to 90%, the utility model discloses a quartz mirror compares in the coating film technique that prior art adopted, and quartz mirror has long service life and easy clear characteristics.

Example three:

on the basis of the above embodiment, the present embodiment: the base 2 of hollow pyramid 1 sets up to the cylindricality, and pyramid 1 is through gluing on the centrum, can no longer introduce more stress when fixed hollow pyramid 1, and the movement error when using hollow pyramid in the instrument can be reduced to can not exert an influence to hollow pyramid 1's optical property. Moreover, in the application of precise distance measurement, the use of the base 2 can effectively reduce the slight fluctuation of the pyramid, thereby improving the precision of the distance measurement.

In conclusion, because the manufacturing dimensional tolerance of each part in the fixing device is small, and the parts are installed in a matching way, the installation precision of the corner cube prism is ensured, and artificial assembly errors cannot be introduced.

In the above embodiments, the lens shape is a right-angle fan, and the lens shape may also be a right-angle triangle or a square.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A hollow metal pyramid comprises a hollow pyramid (1) and a base (2), wherein the pyramid part is placed in the base,

the hollow pyramid (1) is characterized by comprising three lenses (3) which have the same size and are provided with reflecting surfaces, and one edge of one lens is glued with the reflecting surface of the other lens;

the shape of the lens (3) is a figure with at least one right angle; each lens has an extension (5), the extension (5) extends from a right angle, and the extension (5) forms an angle larger than 90 degrees and smaller than 180 degrees with the back surface of the reflecting surface;

every two of the three lenses (3) are mutually vertical, after the lenses (3) are mutually vertical and combined, the extending parts (5) of the three lenses (3) are close to each other in parallel to form a cylinder to form an extending group, and the extending group is provided with external threads; there is a fixed sleeve (4) with internal screw thread, the internal screw thread matches with the screw thread on the extension set.

2. The hollow metal pyramid as claimed in claim 1, characterized in that the lenses (3) of the hollow pyramid (1) are quartz lenses with a thickness of 1 mm.

3. The hollow metal pyramid as claimed in claim 1, characterized in that the base (2) is made of a metal material.

4. The hollow metal pyramid as claimed in claim 1, characterized in that the angle error of the hollow pyramid (1) is ≦ 5 ".

5. The hollow metal pyramid as claimed in claim 1, characterized in that the hollow pyramid (1) and the base (2) are joined by gluing.

6. The hollow metal pyramid as claimed in claim 1, characterized in that the surface shape error of the hollow pyramid (1) is ≦ λ/4.

7. The hollow metal pyramid as claimed in claim 1, characterized in that the reflectivity of the hollow pyramid (1) is equal to or greater than 90%.

8. The hollow metal pyramid as claimed in claim 1, characterized in that the base (2) is a hollow cylinder.

9. The hollow metal pyramid as claimed in claim 1, characterized in that the shape of the lens (3) is a right-angled sector, a right-angled triangle or a square.