TW201530177A - Range finder - Google Patents

Abstract

A range finder includes a laser transmitter, a laser receiver, a far infrared ray image sensing device and a display device. The laser transmitter emits a laser beam to a measured object. A laser receiver receives the laser beam that is reflected back from the measured object. The far infrared ray image sensing device receives a far infrared ray that is emitted from the measured object and generates an image signal. The display device displays the image of the measured object that is captured by the far infrared ray image sensing device.

Description

rangefinder

The invention relates to a range finder, in particular to a range finder having the function of observing far infrared ray images.

Please refer to Fig. 1. Fig. 1 is a schematic diagram of a range finder generally having a nighttime ranging function. The display system of the range finder 10 is composed of a display device 17 and an eyepiece 18. The laser transmitting and receiving system of the range finder 10 is composed of a laser emitter 12, a second collimating lens 21, an objective lens 13, a cymbal device 14, and a laser receiver 19, and the laser emitter 12 emits laser light 12T. The object to be measured (not shown) is reflected, and the object to be detected can reflect the laser light 12T, and the reflected laser light 12R is directed to the range finder 10 and finally received by the laser receiver 19. The image capturing system of the range finder 10 is composed of the objective lens 13, the cymbal device 14, the focus lens 15 and the image sensing device 16, and can capture the image of the object to be measured when the illuminance is sufficient. The night vision system of the range finder 10 is composed of an infrared light emitting device 11, a first collimating lens 20, an objective lens 13, a cymbal device 14, a focus lens 15 and an image sensing device 16, and when the nighttime or illumination is insufficient, the infrared The light emitting device 11 emits infrared light 11T to illuminate the object to be tested, and the object to be tested can reflect the infrared light 11T, so that the reflected infrared light 11R is directed to the range finder 10 and finally received by the image sensing device 16, and the image sensing device 16 will again The infrared optical image of the object to be tested is converted into an image signal, and the image signal is output to the display device 17 to display an infrared image of the object to be tested.

In the above-mentioned range finder with night distance ranging function, the image sensing device 16 mostly adopts an image intensifier or a high-sensitivity CCD, and the distance of the infrared image that can be observed at night is only about 200 meters, for 200. Objects outside the metric can't effectively measure their distance. In addition, in harsh environments (such as rain, glare, no light, fire and smoke), this type has The range finder of the night ranging function cannot observe the infrared image due to interference from the external environment, and the distance cannot be measured.

In view of this, the main object of the present invention is to provide a range finder capable of observing a far-infrared image of a measured object without being affected by harsh environments such as rain, glare, no light, fire, and smoke, and can be clearly observed. Objects as far as 1000 meters.

The range finder of the present invention comprises a laser emitter, a laser receiver, a far infrared image sensing device and a display device. The laser emitter emits a laser beam to an object to be measured. The laser receiver receives the laser light reflected from the object under test. The far-infrared image sensing device receives a far infrared ray emitted by the object to be detected and generates an image signal. The display device displays an image of the object to be inspected by the far-infrared image sensing device.

The range finder of the present invention may further comprise a cymbal device disposed between the laser emitter and the object to be tested, such that the laser beam passes through the cymbal device and is directed toward the object to be tested, and the laser beam reflected by the object to be measured is reflected. After passing through the device, it is guided to different directions to direct the laser light to the laser receiver.

The range finder of the present invention may further include a lens disposed between the 稜鏡 device and the object to be tested.

The laser emitter is a semiconductor laser.

The laser receiver is a crash light diode (APD) or a light diode (PD).

The display device is a liquid crystal display (LCD) or an organic light emitting diode (OLED) or an active matrix organic light emitting diode (AMOLED).

The range finder of the present invention may further include an eyepiece disposed adjacent to the display device to view the display device through the eyepiece.

The range finder of the invention may further comprise a lens located in the far infrared image sensing Between the device and the object to be tested.

The far-infrared image sensing device has a sensing wavelength range of 8000 nm to 14000 nm.

The far-infrared image sensing device is a thermal non-cooling infrared focal plane array component, and the thermal non-cooling infrared focal plane array component is composed of a pyroelectric material or a thermistor material. The thermistor material can be made of vanadium monoxide or an amorphous germanium.

The above described objects, features, and advantages of the invention will be apparent from the description and appended claims

10‧‧‧ Rangefinder

11‧‧‧Infrared light emitting device

12‧‧‧Laser transmitter

13‧‧‧ Objective lens

14‧‧‧稜鏡Device

15‧‧‧focus lens

16‧‧‧Image sensing device

17‧‧‧Display device

18‧‧‧ eyepiece

19‧‧‧ Laser Receiver

20‧‧‧First collimating lens

21‧‧‧Second collimating lens

11T‧‧‧Infrared light

11R‧‧‧reflecting infrared light

12T‧‧‧Laser light

12R‧‧‧reflecting laser light

30‧‧‧ Rangefinder

31‧‧‧Laser transmitter

32‧‧‧ Laser Receiver

33‧‧‧稜鏡Device

331‧‧‧First Triangle

332‧‧‧The second triangle

3311‧‧‧Optical multilayer film

34‧‧‧ Objective lens

35‧‧‧ far infrared image sensing device

36‧‧‧Display device

37‧‧‧ eyepiece

31T‧‧‧Laser light

31R‧‧‧reflecting laser light

FIR‧‧‧ far infrared

40‧‧‧Measured object

41‧‧‧ Processor

42‧‧‧Laser transmitter

43‧‧‧Laser Receiver

44‧‧‧Amplifier

45‧‧‧ comparator

46‧‧‧Digital Analog Converter

47‧‧‧ far infrared image sensing device

49‧‧‧Display device

Figure 1 is a schematic diagram of a range finder generally having a nighttime ranging function.

Figure 2 is a schematic illustration of one embodiment of a range finder in accordance with the present invention.

Figure 3 is a block diagram of a range finder in accordance with the present invention.

Please refer to FIG. 2, which is a schematic diagram of an embodiment of a range finder according to the present invention. As shown, the range finder 30 includes a laser emitter 31, a laser receiver 32, a cymbal device 33, an objective lens 34, a far infrared image sensing device 35, a display device 36, and an eyepiece. 37. The cymbal device 33 includes a first triangular yoke 331 , a second triangular yoke 332 and an optical multilayer film 3311 . The first triangular yoke 331 and the second triangular yoke 332 each have a slope corresponding to each other. The optical multilayer film 3311 is selectively plated on the slope of the first triangular ridge 331 or the second triangular ridge 332.

When in use, the range finder 30 is opposed to a measured area (not shown), and a far-infrared FIR will be directed from the measured area to the range finder 30, and the far-infrared FIR is sensed via the far-infrared image. After receiving 35, the far-infrared image of the measured area can be captured, and the far-infrared image of the measured area is transmitted to the display device 36 for viewing by the user. The user can measure the rangefinder 30 according to the far-infrared image of the measured area. Align one of the objects (not shown). Then, the laser emitter 31 emits a laser beam 31T to the object to be tested, and receives a reflected laser light 31R reflected by the object to be measured by the laser receiver 32, and then performs subsequent data processing to measure the measured object. The distance is transmitted to display device 36 for viewing by the user.

The optical path of the far infrared rays in use will be described below. As shown in Fig. 2, in use, the range finder 30 is opposed to the area to be measured, and the object to be tested (not shown) of the measured area itself has a temperature, and a far-infrared infrared ray is emitted to the range finder 30. After receiving the far-infrared FIR, the infrared image sensing device 35 can convert the far-infrared optical image of the measured area into an image signal, and the image signal is output to the display device 36, and the eyepiece 37 is disposed beside the display device 36. The eye can view the image of the area to be measured presented by the display device 36 through the eyepiece 37.

The optical path of the laser light in use will be described below. As shown in FIG. 2, the range finder 30 is adjusted so that the range finder 30 is correctly aligned with the measured object in the measured area, the laser emitter 31 emits a laser light 31T, and the laser light 31T passes through the sputum device 33 first. The crucible device 33 includes a first triangular crucible 331 and a second triangular crucible 332. The beveled surface of the first triangular crucible 331 is plated with an optical multilayer film 3311, and the optical multilayer film 3311 allows only part of the laser light 31T to pass. The remaining laser light 31T will be reflected, and the laser light 31T passing through the cymbal device 33 passes through the objective lens 34 and then is directed toward the object to be measured. The object to be tested can reflect the laser light 31T, so that a reflected laser light 31R is directed to the distance measurement. The instrument 30, the reflected laser light 31R directed to the range finder 30 first enters the sputum device 33 through the objective lens 34, and the reflected laser light 31R of the incident cymbal device 33 is reflected and redirected to the laser receiver 32. After receiving the reflected laser light 31R, the laser receiver 32 outputs the measured distance of the measured object to the display device 36 through subsequent data processing, and the user then views the measured object distance data presented by the display device 36 through the eyepiece 37. .

A block diagram of the range finder of the present invention will be described below. As shown in FIG. 3, the range finder of the present invention can send a driving signal to drive the laser emitter 42 via the processor 41, so that the laser emitter 42 emits a beam of laser light to the object to be tested 40, and the object to be tested 40 further reflecting the laser light, causing a beam of reflected laser light to be directed to the range finder, and finally receiving the reflected laser light by the laser receiver 43, and the laser receiver 43 converts the received reflected laser light signal into a voltage signal output. The voltage signal input amplifier 44 is amplified and then input to the comparator 45. When the processor 41 sends the driving signal, the digital reference level signal is also simultaneously sent. The digital reference level signal is converted into an analog reference level signal by the digital analog converter 46, and then input to the comparator 45. The comparator 45 compares the amplified voltage signal with the analog reference level signal. When the comparator 45 has an output signal, the laser receiver 43 has received the reflected laser light signal, and the comparator 45 inputs the output signal to the processor 41. The processor 41 calculates, according to the output signal of the comparator 45, the time interval from the laser light emitted from the laser emitter 42 to the laser receiver 43 to receive the reflected laser light, and further calculates the object 40. The distance data is then output to the display device 49 for viewing by the user. In addition, after the far infrared rays from the object 40 are directed to the range finder, they are received by the far infrared ray image sensing device 47, and the far infrared ray image sensing device 47 can convert the far infrared ray into an image signal, and the image signal is output to the image signal. The display device 49 allows the user to view the far infrared image of the object 40.

In the above embodiment, the far-infrared infrared light is directly incident on the far-infrared image sensing device 35. However, it can be understood that if a lens is placed between the object to be measured and the far-infrared image sensing device 35, it should also belong to the present invention. category.

The laser emitter 31 in the above embodiment may be a semiconductor laser. The laser receiver 32 can be a crash light diode (APD) or a photodiode (PD). The display device 36 can be a liquid crystal display (LCD) or an organic light emitting diode (OLED) or an active matrix organic light emitting diode (AMOLED). The far-infrared image sensing device 35 may be an Infrared Focal Plane Array (Infrared Focal Plane Array). The type of non-cooling infrared focal plane array element may be made of a pyroelectric material or a thermistor material, which may be vanadium oxide or amorphous.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and it is possible to make some modifications without departing from the spirit and scope of the invention. And the scope of the present invention is defined by the scope of the appended claims.

30‧‧‧ Rangefinder

31‧‧‧Laser transmitter

32‧‧‧ Laser Receiver

33‧‧‧稜鏡Device

331‧‧‧First Triangle

332‧‧‧The second triangle

3311‧‧‧Optical multilayer film

34‧‧‧ Objective lens

35‧‧‧ far infrared image sensing device

36‧‧‧Display device

37‧‧‧ eyepiece

31T‧‧‧Laser light

31R‧‧‧reflecting laser light

FIR‧‧‧ far infrared

Claims (10)

A range finder includes: a laser emitter that emits a laser beam to a measured object; and a laser receiver that receives the lightning reflected from the object to be measured a far-infrared image sensing device that receives a far infrared ray emitted by the object to be detected and generates an image signal; and a display device that displays the object to be inspected by the far-infrared image sensing device image. The range finder of claim 1, further comprising a cymbal device disposed between the laser emitter and the object to be tested, such that the laser light passes through the cymbal device and is directed to the range finder The object to be tested, the laser light reflected by the object to be tested is guided to different directions through the device, and the laser light is directed to the laser receiver. The range finder of claim 2, further comprising a lens disposed between the cymbal device and the object to be tested. The range finder of claim 1, wherein the laser emitter is a semiconductor laser. The range finder of claim 1, wherein the laser receiver is a crash light diode (APD) or a photodiode (PD). The range finder of claim 1, wherein the display device is a liquid crystal display (LCD) or an organic light emitting diode (OLED) or an active matrix organic light emitting diode (AMOLED). The range finder of claim 1, further comprising an eyepiece disposed adjacent to the display device to view the display device through the eyepiece. The range finder of claim 1, further comprising a lens between the far infrared image sensing device and the object to be tested. The range finder of claim 1, wherein the far infrared image sensing device senses a wavelength range of 8000 nm to 14000 nm. The range finder of claim 1, wherein the far-infrared image sensing device is a thermal non-cooling infrared focal plane array element (Infrared Focal Plane Array), the thermal non-cooling infrared focal plane The array element is made of a pyroelectric material or a thermistor material, which may be vanadium monoxide or an amorphous germanium.