RU168079U1 - DEVICE FOR IDENTIFICATION OF OBJECT IN COAGENT LIGHT - Google Patents

Abstract

The device can be used in geodesy for georeferencing and orientation. The device comprises a first laser and a first collimator forming a light beam with a wavelength λ, a mirror with a reflective coating having a center hole диаметром in diameter through which a light beam with a wavelength λ passes, a second laser and a second collimator forming a light beam with a wavelength λ. The optical axis of the second collimator is directed at an angle of 90 ° to the optical axis of the first collimator and passes through the center of the mirror. The diameter of the ∅ light beam at the output of the second collimator is 1.5 ∅. The mirror and the second collimator are installed with the possibility of combining the optical axes of the second and first collimators from the point of intersection in the center of the mirror. The technical result is the expansion of technological capabilities due to the unidirectional impact on the recognized object by coherent light beams with wavelengths λ and λ. 2 ill.

Description

The utility model relates to the field of optical laser instrumentation and can be used in various industries, in particular in geodesy, for georeferencing and orientation, when pointing a thermal (infrared) radiation source on the ground.

A device is known (see www.500mwlaser.ru), containing a lighting part, including a laser and a collimator, consisting of the first and second lenses, forming a beam of parallel light rays with a wavelength of λ ₁ .

A device is known (see Patent No. 140575 dated April 9, 2014 IPC G01B 9/025. Bull. No. 13, 2014 Auth. Chernykh VT, Chernykh GS), containing a source of coherent radiation, a collimator, consisting of the first and second lenses, forming a light beam with a wavelength of λ ₁ , a plane-parallel plate, a projection lens, a field diaphragm mounted between the second lens and the working area.

The closest technical solution is the device (see Patent No. 123136 dated December 20, 2012 IPC G01B 9/021. Bull. No. 35, 2012 Authors Chernykh V.T., Chernykh G.S., Borisov A.N. ., Tukshaitov R.Kh.), containing a laser radiation source, a collimator, consisting of the first and second lenses, forming a light beam with a wavelength of λ ₁ , two plane-parallel plates installed in the working area at equal but opposite directions to the optical collimator axis.

The main disadvantage of the known devices, according to the authors, is a narrow range of technological capabilities for identifying an object in coherent light, since the known devices use only one spectral wavelength range of the visible region of the spectrum.

However, in practice, there are a number of tasks for identifying an object in coherent light, for the solution of which it is advisable to use other spectral regions, for example, the infrared wavelength range.

The objective of the proposed utility model is the development of a device for recognizing an object in a coherent light, which eliminated the main disadvantage of analogues and prototype.

The technical result of the proposed utility model is the expansion of the technological capabilities of the device when recognizing an object in coherent light by providing unidirectional effects on the recognizable object in coherent light beams with wavelengths λ ₁ and λ ₂ .

The technical result is achieved in that a device for recognizing an object in coherent light, comprising an optically coupled first laser and a first collimator having a first and second lenses forming a light beam with a wavelength of λ ₁ and mounted along the optical axis of the first collimator, according to the proposed utility model, further comprises a mirror with a reflective coating, an optically coupled second laser and a second collimator, also having a first and second lenses forming a light beam with a wavelength of λ ₂ , pr and the optical axis of the second collimator is directed at an angle of 90 ° to the optical axis of the first collimator and passes through the center of the mirror, which is located behind the second lens of the first collimator at an angle to the optical axis, and the reflective coating of the mirror is turned in the opposite direction relative to the second lens of the first collimator, at the center of the mirror, a hole is made with a diameter of выполнено _о , through which a light beam with a wavelength λ _{1 of the} first collimator passes, the diameter ∅ _{n of the} light beam at the output of the second collimator The ora is determined by the diameter of the hole ∅ _{о of the} mirror and is equal to 1.5∅ _о , and the mirror with the hole and the second collimator are installed with the possibility of combining the optical axis of the second collimator with the optical axis of the first collimator, starting from the point of intersection in the center of the mirror, making it possible unidirectional propagation of coherent light beams with wavelengths λ ₁ and λ ₂ to identify the object.

The essence of the utility model is illustrated by the drawing (Fig. 1), which shows a schematic diagram of the optical system of the proposed device for identifying an object in coherent light. In FIG. 2 shows a section AA in FIG. one.

The numbers in FIG. 1 marked:

1 - the first laser;

2 - the first lens (negative lens) of the first collimator;

3 - the second lens of the first collimator;

4 - a mirror;

5 - reflective coating of the mirror;

6 - hole made in the mirror;

7 - recognition zone;

8 - second laser;

9 - the first lens (negative lens) of the second collimator;

10 - the second lens of the second collimator.

A device for identifying an object in coherent light contains optically coupled first laser 1, first lens 2 and second lens 3 of the first collimator, forming a light beam with a wavelength of λ ₁ and installed along the optical axis of the first collimator.

The difference of the proposed device is that it further comprises a mirror 4 with a reflective coating 5, optically coupled to a second laser 8, a first lens 9 and a second lens 10 of the second collimator, forming a light beam with a wavelength of λ ₂ .

The optical axis of the second collimator makes an angle of 90 ° with the optical axis of the first collimator and passes through the center of the mirror 4.

The mirror 4 with a reflective coating 5 is located behind the second lens of the first collimator at an angle to the optical axis.

The reflective coating 5 of the mirror 4 is facing in the opposite direction relative to the second lens of the first collimator.

In the mirror 4, a hole 6 is made with a diameter of ∅ _о , through which a light beam with a wavelength λ _{1 of the} first collimator passes. The diameter ∅ _about determines the inner diameter of the light beam of the second collimator after reflection from the coating 5 of the mirror 4.

The diameter ∅ _{p of the} light beam at the output of the second collimator is determined by the diameter of the hole ∅ _{о of the} mirror and is equal to 1.5∅ _о .

Mirror 4 and the second collimator are installed with the possibility of combining the optical axes of the first and second collimators, starting from the point of their intersection, providing the possibility of unidirectional propagation of coherent light beams W ₁ and W ₂ with wavelengths λ ₁ and λ _2, respectively, to identify the object in zone 7.

The principle of operation of the proposed device for identifying an object in coherent light is as follows.

Coherent radiation from the first laser 1, emitting a light flux at a wavelength of λ ₁ equal to 632 nm (green light), enters the first collimator, consisting of lenses 2 and 3. At the output of the first collimator, a beam of parallel light rays W _{1 with a} diameter of ∅ _{1 is formed} . Then, the light beam W _{1 is} passed through an opening 6 made in the mirror 4, and then the light beam W ₁ with a wavelength of λ ₁ reaches the object recognition zone 7. The mirror 4 with the hole 6 is set at an angle of 45 ° to the optical axis of the first collimator.

With the diameter ∅ _{1 of the} light beam W _{1, the} diameter ∅ _{о of the} hole 6 of the mirror 4, set at an angle α equal to 45 °, will be determined by the formula ∅ _о = ∅ ₁ / cosα, where α is the angle of inclination of the mirror 4 to the optical axis. When an identifiable object is located in zone 7 on its surface, a section (“spot”) of the beam W _{1 with a} diameter of ∅ _{1 of} green light corresponding to a wavelength of λ _{1 is} observed.

Next, the coherent radiation of the second laser 8, emitting at a wavelength of λ ₂ , is sent to the second collimator, consisting of the first 9 and second 10 lenses, forming a light beam W _{2 with a} diameter of ∅ _n . Then the light beam W ₂ with a wavelength of λ _{2 is} sent to the reflective coating 5 of the mirror 4. After reflection of the light beam W ₂ from the mirror 4, the beam takes the form of a luminous ring. The outer diameter of the luminous ring is determined by the light diameter ∅ _{n of the} second lens of the second collimator, and the inner diameter is determined by the diameter ∅ _{of the} hole 6 of the mirror 4.

The direction of propagation of the reflected light beam W ₂ coincides with the direction of propagation of the beam W ₁ , since the optical axes of the first and second collimators coincide with each other, starting from the point of intersection. When the light beam W ₂ reaches the recognition zone 7 on the object, a section of the beam is observed in the form of a luminous ring, the light of which corresponds to a wavelength of λ ₂ . If the wavelength λ _{2 is} chosen equal to 670 nm, then the luminous ring will be red light.

Since light beams W ₁ with a wavelength of λ ₁ and W ₂ with a wavelength of λ ₂ have unidirectional propagation, a section of the light beam shown in FIG. 2. In the drawing, the inner spot (horizontal hatching) corresponds to the green radiation region λ ₁ , the outer cross section corresponds to the red radiation region λ ₂ (vertical hatching). Therefore, due to this, the possibility of unidirectional recognition of an object in coherent light beams with wavelengths λ ₁ and λ _{2 is} achieved.

Using the proposed device, it is possible to carry out recognition of an object sequentially in time both at a wavelength of λ ₁ and at a wavelength of λ ₂ depending on the task.

In the proposed device as the first laser 1 use a laser emitting in the infrared region of the spectrum. In the proposed device, the lenses 2 and 3 of the first collimator are made of optical material that is transparent in the infrared region of wavelengths. A light beam W ₂ with a wavelength λ _{2 of the} visible region acts as a reference beam, according to which it is “linked” to the recognition zone, and by means of a light beam of infrared radiation W ₁ with a wavelength λ ₁ , the object itself is recognized in zone 7.

Thus, a device has been created that allows to expand technological capabilities when identifying an object in a coherent light to solve various practical problems.

By means of the proposed device, it becomes possible to identify an object in different regions of the visible wavelength range, as well as in the infrared region of the spectrum, which significantly expands the practical capabilities of the device.

Claims (1)

A device for recognizing an object in coherent light, comprising an optically coupled first laser and a first collimator having a first and second lenses forming a light beam with a wavelength of λ ₁ and mounted along the optical axis of the first collimator, characterized in that it further comprises a mirror with a reflective coating optically coupled to a second laser and a second collimator, also having a first and second lenses forming a light beam with a wavelength of λ ₂ , while the optical axis of the second collimator is directed under angle of 90 ° to the optical axis of the first collimator and passes through the center of the mirror, which is located behind the second lens of the first collimator at an angle to the optical axis, with the reflective coating of the mirror facing in the opposite direction relative to the second lens of the first collimator, a hole is made in the mirror with its center diameter ∅ _about, through which passes a light beam having a wavelength λ ₁ of the first collimator, the diameter ∅ _n light beam exiting the collimator is determined by the diameter of the second holes _of ∅ mirror and composition yaet value equal 1,5∅ _o, and the mirror with the opening and a second collimator mounted to the alignment of the optical axis of the second collimator to the optical axis of the first collimator, from the point of intersection in the center of the mirror, allowing the unidirectional propagation of coherent light beams with wavelengths λ ₁ and λ ₂ to identify the object.

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