CN104714308A - Optical element generating 360-degree collimated light beam - Google Patents

Abstract

The invention relates to the optical field, in particular to an optical element generating a 360-degree collimated light beam. The optical element comprises a conical body. The side face of the conical body is a reflecting face. The reflecting face is a rotational symmetry face. A bus of the rotational symmetry face is a curve recessed inwards. The rotational symmetry face can have the light beam collimating function and the 360-degree reflecting function at the same time. By the adoption of the optical element, light beam collimation and 360-degree annular light outgoing can be achieved, the complexity of a system is reduced to the maximum extent, and production and adjustment cost is reduced.

Description

Optical element for generating 360-degree collimated light beam

Technical Field

The invention relates to the field of optics, in particular to an optical element.

Background

In the field of geodetic surveying, the situation that 360-degree annular collimated light beams need to be generated is often met, the scheme adopted at present is that light beams of a semiconductor laser are collimated firstly, the collimated light beams vertically enter a 45-degree conical surface, and the light beams are reflected by the conical surface and then exit in an annular shape of 360 degrees with a stroke surrounding the conical surface.

Disclosure of Invention

The present invention is directed to an optical element for generating a 360-degree collimated light beam, so as to solve the above technical problems.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

an optical element for generating a 360-degree collimated light beam comprises a conical body, wherein the side surface of the conical body is a light reflecting surface; the light reflecting surface is a rotational symmetry surface, and a generatrix of the rotational symmetry surface is an inwards concave curve.

The rotational symmetry plane can simultaneously have the functions of beam collimation and 360 reflection. The invention can finish light beam collimation and 360-degree annular light emitting, thereby reducing the complexity of the system to the maximum extent and reducing the production, installation and adjustment cost.

When the light source is used, the cone body is coaxial with the light source, and the light source is arranged at one end of the top point of the reflecting surface. When the light source emits a light beam with a certain divergence angle, all light rays are reflected out from the direction vertical to the rotational symmetry axis at different angles through the light reflecting surface, so that a collimated light beam with a certain width can be obtained within a range of 360 degrees.

The rotationally symmetric surface may be an aspherical surface, a quadratic surface, a free-form surface, or the like. Preferably aspherical. Aspheric coefficient of the aspheric surface

$z=\frac{y^2}{R(1+\sqrt{1-(1+K)y^2/R^2})}+{\mathrm{Ay}}^4+B{y}^6+C{y}^8+D{y}^{10}+E{y}^{12}+{\mathrm{Fy}}^{14}+G{y}^{16}+H{y}^{18}+J{y}^{20},$ Wherein,

the cone is not limited by materials:

the cone body can be made of acrylic materials. The side surface of the cone body is plated with a reflective film or coated with a reflective coating to form the reflective surface. The acrylic material has good transparency, light texture, low price and easy molding.

The cone may also be a cone made of a resin material. The side surface of the cone body is plated with a reflective film or coated with a reflective coating to form the reflective surface. The resin material has light texture, impact resistance, convenient processing and low cost.

The cone body can also be made of optical glass, and the side surface of the cone body is plated with a reflective film or coated with a reflective coating to form the reflective surface. The optical glass has high temperature resistance, low expansion coefficient, high mechanical strength and good chemical performance.

Has the advantages that: the invention has the advantages of high integration level, simple structure, convenient assembly and adjustment and the like, and greatly reduces the production cost.

Drawings

Fig. 1 is a light path diagram of the present invention in use.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below with the accompanying drawings.

Referring to fig. 1, an optical element for generating a collimated beam of 360 degrees comprises a cone, wherein the side surface of the cone is a light reflecting surface 1; the reflecting surface 1 is a rotational symmetry surface, and a generatrix of the rotational symmetry surface is an inward concave curve. The rotational symmetry plane can simultaneously have the functions of beam collimation and 360 reflection. The invention can finish light beam collimation and 360-degree annular light emitting, thereby reducing the complexity of the system to the maximum extent and reducing the production, installation and adjustment cost. When in use, the cone body is coaxial with the light source 2, and the light source 2 is arranged at one end of the top point of the reflecting surface 1. When the light source 2 emits a light beam with a certain divergence angle, all the light rays are reflected from the direction perpendicular to the rotational symmetry axis at different angles by the light reflecting surface 1, so that a collimated light beam with a certain width can be obtained within a range of 360 degrees.

The rotationally symmetric surface may be an aspherical surface, a quadratic surface, a free-form surface, or the like. Preferably aspherical. Aspherical surface coefficient

$z=\frac{y^2}{R(1+\sqrt{1-(1+K)y^2/R^2})}+{\mathrm{Ay}}^4+B{y}^6+C{y}^8+D{y}^{10}+E{y}^{12}+{\mathrm{Fy}}^{14}+G{y}^{16}+H{y}^{18}+J{y}^{20},$ Wherein,

the cone is not limited by material: the cone body can be made of acrylic materials. The side surface of the cone body is plated with a reflective film or coated with a reflective coating to form a reflective surface 1. The acrylic material has good transparency, light texture, low price and easy molding. The cone may also be a cone made of a resin material. The side surface of the cone body is plated with a reflective film or coated with a reflective coating to form a reflective surface 1. The resin material has light texture, impact resistance, convenient processing and low cost. The cone body can also be made of optical glass, and the side surface of the cone body is plated with a reflective film or coated with a reflective coating to form a reflective surface 1. The optical glass has high temperature resistance, low expansion coefficient, high mechanical strength and good chemical performance.

The cone body is also provided with a rotating shaft, the rotating shaft is fixed on one side far away from the top point of the reflecting surface 1, and the central axis of the rotating shaft is superposed with the rotating central axis of the cone body. To allow the fixation of the invention by the rotation axis and to allow the rotation axis to be turned, thereby turning the light-reflecting surface 1. The rotating reflecting surface 1 can avoid uneven light emitting caused by partial defects of the reflecting surface 1, and is favorable for improving the light emitting performance. The rotating shaft is connected with a rotating shaft of a motor through a coupling. So as to drive the rotating shaft to rotate through the motor.

An optical element for generating 360-degree collimated light beams can further comprise a laser emitting system, the laser emitting system comprises a laser, the laser is located in the cone-shaped body, a control is arranged at the vertex of the reflecting surface 1, a hole is used as a light outlet of the laser, and the optical axis of the laser coincides with the rotating central axis of the cone-shaped body. To determine whether the light source is co-axial with the present invention by the laser.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. An optical element for generating a 360-degree collimated light beam comprises a conical body, wherein the side surface of the conical body is a light reflecting surface; the light reflecting surface is a rotational symmetry surface, and a generatrix of the rotational symmetry surface is an inwards concave curve.

2. An optical element for producing a 360 degree collimated beam of light according to claim 1, wherein: the rotational symmetry plane is an aspheric surface, a quadric surface or a free-form surface.

3. An optical element for producing a 360 degree collimated beam of light according to claim 2, wherein: the rotation symmetrical surface is an aspheric surface, and the aspheric surface coefficient of the aspheric surface

$z=\frac{y^2}{R(1+\sqrt{1-(1+K)y^2/R^2})}+A{y}^4+B{y}^6+C{y}^8+D{y}^{10}+{\mathrm{Ey}}^{12}+F{y}^{14}+G{y}^{16}+H{y}^{18}+J{y}^{20},$ Wherein,

4. an optical element for producing a 360 degree collimated beam of light according to claim 1, 2 or 3, wherein: the side surface of the cone body is plated with a reflective film or coated with a reflective coating to form the reflective surface.