CN211373843U

CN211373843U - Thermal image device with light indicator

Info

Publication number: CN211373843U
Application number: CN201921215788.2U
Authority: CN
Inventors: 王浩
Original assignee: Hangzhou Alpha Infrared Detection Technology Co ltd
Current assignee: Hangzhou Alpha Infrared Detection Technology Co ltd
Priority date: 2018-07-30
Filing date: 2019-07-30
Publication date: 2020-08-28
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a thermal imagery device with light indicator relates to the application of infrared thermal imagery, and the indicating effect of single facula is not ideal among the prior art. The utility model provides a thermal imagery device with light indicator, include: the light indicator is assembled on the shell and/or the lens, and the light indicator generates one or more light spots, so that the problems in the prior art are solved.

Description

Thermal image device with light indicator

Technical Field

The invention discloses a thermal image device with an optical indicator, and relates to the field of application of infrared thermal images.

Background

In order to facilitate the user to associate the displayed infrared thermal image with the actual object to be shot, a laser can be installed on the thermal image device, and the object to be shot can be observed through light spots, however, the indicating effect of a single point-like light spot in the prior art is not ideal.

Accordingly, it is appreciated that there is a need for a thermal imaging apparatus that addresses the above-mentioned problems.

Disclosure of Invention

The invention provides a thermal image device with an optical indicator, comprising: the device comprises a shell, a lens and a light indicator, wherein the thermal image processing device is arranged in the shell, the lens and the light indicator are assembled on the shell and/or the lens, and the light indicator can generate 1 or more than 1 light spot.

Further, the light pointer comprises 1 or more than 1 laser pointer, and the single laser pointer can generate one light spot.

Further, the light pointer is a single laser pointer which can generate a plurality of light spots.

Further, the light spot area generated by the light indicator approximately reflects the relation between the measuring distance and the effective measuring size of the measured body.

Furthermore, the angle between the optical axis of the light indicator and the optical axis of the lens can be adjusted.

Furthermore, the optical axis of the light indicator and the optical axis of the lens form an angle x, and the angle x is configured between-5 degrees and-5 degrees.

Further, the light indicator is configured to surround the lens.

Further, the light indicator is configured to surround the optical axis of the lens, and the generated light spot is polygonal or circular.

Furthermore, the thermal image device is provided with a display control part for displaying an infrared thermal image and a mark, wherein the infrared thermal image represents the visual field range of the shot object, and the mark represents the approximate position of the light spot generated by the light indicator in the visual field range.

Further, the diameter or the side length of the indication area represented by the light spot is more than 5 CM; the light indicator is provided with a corresponding power supply control switch; the position of the mark is determined according to the angle of view of the lens, the angle between the optical indicator 3 and the optical axis of the lens and the shooting distance; the thermal imaging device is provided with a distance measuring component.

Adopt the beneficial effects of the utility model:

through setting up the utility model discloses, except can instructing approximate shooting angle and the direction of camera lens, can also instruct approximate shooting region.

The angle between the optical axis of the optical indicator and the optical axis of the lens can be adjusted, and the optical indicator can accurately indicate the shooting range of the lens.

The relation between the measuring target and the measured object can be shown through the matching of the lens and the thermal imaging device.

The rotating component is arranged at the connecting part of the light indicator and the thermal image device, so that the light indicator can rotate, and the indicating area range of the light indicator can be more accurate and striking.

Drawings

FIG. 1 is a schematic view of a thermal image apparatus of embodiment 1;

FIG. 2 is a schematic diagram showing the relationship between measured distance and target size of a thermal imaging device;

FIG. 3 is a schematic view of the thermal image device of embodiment 2;

fig. 4 is a schematic diagram of 6 light spots generated by a light pointer.

The attached drawings indicate the following: the device comprises a shell 1, a lens 2, a light indicator 3 and a handle 4.

Detailed Description

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Note that the following examples are to be described for better understanding of the present invention, so the scope of the present invention is not limited and various forms within the scope of the present invention may be changed.

Example 1

Fig. 1 is a schematic view of a thermal image device of embodiment 1 of the present invention.

A thermal image device with a cursor indicator comprises a shell 1, a lens 2 and a light indicator 3, wherein the light indicator 3 is arranged at the shell 1 or the lens 2, and the light indicator 3 is arranged at the lens 2 in the embodiment. The housing 1 includes a handle 4, the handle 4 providing a convenient grip for a user. The lens is an infrared lens. And a thermal image processing device is arranged in the shell 1.

In this embodiment, the thermal imaging device includes an infrared detector and a processing circuit. The infrared detector and the processing circuit form an infrared thermal image, and the infrared thermal image can convert the obtained electric signals into digital thermal image data for output; furthermore, the thermal image device can also obtain display data, storage data and the like of the infrared thermal image.

As shown in fig. 4, the light pointer 3 is a laser pointer that generates a narrow beam and generates a spot showing an indication action on an object. The laser pointer is capable of generating one or more spots. In order to improve the observation effect, it is preferable to use a laser pointer capable of generating 6 or more light spots, and the light spots generated by the laser pointer are arranged in a ring shape. The laser indicator can generate red light spots, blue light spots, green light spots, blue and violet light spots and the like, and the generated light spots can be in a point shape, a linear shape, a cross shape and the like. In this embodiment, a laser pointer capable of generating red light and point-like light spots is adopted. For viewing purposes, at a greater distance, e.g., 5 meters, the spot may form a spot indicating area having a diameter greater than 5CM or a maximum side length greater than 5 CM. The optical axis of the light pointer 3 is substantially parallel to the optical axis of the optical lens.

The range of the light spot indication area generated by the light indicator can reflect the relation between the measurement distance and the size of the measured object. Specifically, the range of the area indicated by the light spots formed at a specific distance approximately represents the area range of the thermal image device capable of accurately measuring the temperature at the distance. The angle between the optical axis of the optical indicator and the optical axis of the lens can be determined according to the relation between the measurement target and the size of the measured object, which is determined by the lens and the thermal imaging device matched with the lens, so that the range of a light spot indication area formed by a plurality of light spots approximately reflects the relation between the measurement distance and the size of the measured object. Preferably, an angle between an optical axis of the light indicator and an optical axis of the lens is adjustable.

In this embodiment, the obtaining of the angle x between the optical axis of the optical indicator 3 and the optical axis of the lens is explained by configuring the lens with the field angle of 24 ° × 18 ° by using a 320 × 240 thermal image device:

measuring the relation between the distance and the size of the measured object: the spatial resolution represents the ability of the infrared thermography device to resolve an object, and can be calculated by the following formula, wherein the spatial resolution FOV (rad) ═ (FOV θ/number of pixel units) × (pi/180); the field angle of a standard lens fitted with a thermal image of 320 x 240 pixels was 24 x 18, and the spatial resolution was calculated from the above formula. The spatial resolution (FOV) — (horizontal field angle 24 °/detector horizontal pixel 320) × (pi/180) — 1.3mrad, which 1.3mrad means that theoretically an object of 0.13 × 0.13 m size can fill one pixel at a measurement distance of 100 m.

To measure temperature accurately, an object imaging must be filled with a detector unit pixel. In fact, to ensure that 1 detector unit pixel is filled, the focal projection area of the detected object on the detector must usually satisfy more than or equal to four detector unit images, so as to ensure that one of the images is filled inevitably. Therefore, at a measuring distance of 100 meters, an object with the size of 0.26 meters multiplied by 0.26 meters can be ensured to fill one pixel, and the basic condition of accurate temperature measurement can be achieved.

As shown in fig. 2, the angle x between the optical axis of the light indicator 3 and the optical axis of the lens is calculated and obtained according to the proportional relationship between the measured distance and the size of the object, and the formed light spot needs to approximately represent the relationship between the measured distance and the size of the object in consideration of the factors such as the assembly pitch between a plurality of light indicators, so the angle x between the optical axis of the light indicator 3 and the optical axis of the lens is generally between-5 ° and 5 °. Further, the relationship between the measurement distance and the object size may also be obtained by means of experiments.

The light indicator 3 is arranged at the lens part and can supply power to the light indicator 3 by a built-in battery, a power interface positioned on the lens, a lead wire and the like; the light indicators 3 are provided with corresponding power supply control switches. When the light indicator is mounted on a rotating part of the lens (e.g. a manual focus ring), the light indicator 3 can be powered by welding wires or by a combination of wires and (one or more) elastic contact mechanisms in contact with each other. If the method of welding the wire for power supply is adopted, the allowance of the wire length during rotation is also needed to be considered. When the lens is matched with the thermal imaging device, the lens can be connected with a power supply system of the thermal imaging device through a power supply interface, so that power supply connection and control of the light indicator 3 are realized. The power interface is arranged on a socket of the lens barrel or an elastic contact of the lens base.

It is apparent that embodiment 1 can solve the problems of the prior art, and when the light pointer is mounted on the rotating part of the lens, the light spot generated by the light pointer 3 rotates when the lens is rotated, achieving an accurate and striking pointing effect.

The preferred thermal image device is provided with a display control part for displaying an infrared thermal image and a mark, wherein the infrared thermal image reflects the field range of the shooting. The marks are used for representing the approximate position of the light spot generated by the light indicator 3 in the field of view of the shot range. The position of the mark is determined by the angle of view of the lens, the angle between the optical indicator 3 and the optical axis of the lens, and the shooting distance. The thermal imaging device is provided with a distance measuring component which can be a laser distance measuring component. The distance measuring component can obtain the shooting distance and display the shooting distance on the thermal image device; the shooting distance can also be obtained by means of manual input by the user.

Example 2

FIG. 3 is a schematic view of a thermal image device according to embodiment 2 of the present invention.

As shown in fig. 3, the thermal image device comprises a housing 1, a lens 2, and a light pointer 3, wherein the light pointer 3 is disposed on the housing 1, the light pointer 3 comprises 1 or more than 1 laser pointers, and the single laser pointer generates one light spot. Wherein the housing 1 comprises a gripping portion 4 for gripping by a user. And a thermal image processing device is arranged in the shell 1.

In this embodiment the light pointer 3 is equipped with 6 laser pointers. The optical axis of at least one of the plurality of laser pointers of the light pointer 3 is substantially parallel to the optical axis of the optical lens. The shape of the plurality of laser pointers around the optical axis of the lens is circular, polygonal and the like, in the embodiment, the shape of the plurality of laser pointers around the optical axis of the lens is circular, and accordingly, light spot indication areas with corresponding shapes can be generated on the object, and the light spot indication areas represent the approximate shooting imaging range of the object. Further, the plurality of light indicators may not be limited to be fitted around the lens.

The thermal imaging device comprises an infrared detector, and the infrared detector can obtain infrared thermal images. The infrared detector can transmit the electric signal to other processing devices connected with the thermal imaging device through wires, such as flexible flat cables, cables and the like. The thermal image device can obtain display data, storage data and the like of the infrared thermal image.

The light indicator can configure the included angle between each laser indicator and the optical axis of the lens according to the field angle of the lens, so that the formed light spot can reflect the field angle of the lens; the user can understand the shooting imaging range of the infrared thermal imaging device according to the indication area formed by the light spots.

The thermal image device is provided with a plurality of laser indicators, the indication area range of light spots generated by the laser indicators approximately reflects the relation between the measurement distance and the size of a measured object which is accurately measured, and a user can determine the angle between the optical axis of the light indicator and the optical axis of the optical lens according to the relation between the measurement range of the thermal image device and the size of the measured object, so that the size of the area determined by the light spots generated by the light indicators approximately reflects the relation between the measurement distance and the size of the measured object.

In the above embodiment, taking a handheld thermal imaging device as an example, the invention may be applied to various portable thermal imaging devices with imaging functions and online thermal imaging devices, and the portable thermal imaging devices are not limited to be portable by hands and may also include various wearable thermal imaging devices; the on-line thermal imaging device can also comprise various vehicle-mounted thermal imaging devices, robots, unmanned aerial vehicles and the like.

The above description is only for the embodiments of the present invention, and the structures, dimensions, numbers, etc. shown in the drawings are only for illustration, and the various illustrations do not limit the essence of the present invention, and those skilled in the art can make other modifications and variations to the embodiments after reading the description without departing from the spirit and scope of the present invention.

Claims

1. A thermal imaging apparatus with an optical indicator, comprising: the light indicator is assembled on the shell and/or the lens, and can generate 1 or more than 1 light spot; the light indicator is disposed around the lens.

2. The thermal image system with the optical pointer as set forth in claim 1, wherein the optical pointer is a laser pointer.

3. The thermal image system with the optical pointer as claimed in claim 1, wherein the optical pointer comprises 1 or more than 1 laser pointer, and a single laser pointer can generate one light spot or a plurality of light spots.

4. The thermal image system with optical indicator of claim 1, wherein the light spot area generated by the optical indicator substantially represents the relationship between the measured distance and the effective measured dimension of the measured object; the angle between the optical axis of the light indicator and the optical axis of the lens can be adjusted.

5. The thermal image system with optical indicator of claim 1, wherein the optical axis of said optical indicator is at an angle x with respect to the optical axis of the lens, said x-angle being disposed between-5 ° and 5 °.

6. The thermal image system with the light indicator of claim 1, wherein the light indicator generates a light spot that is polygonal or circular.

7. The thermal imaging device with the optical indicator according to claim 1, wherein the thermal imaging device has a display control for displaying an infrared thermal image representing a field of view of a subject being photographed and a mark; the indicia represent the approximate location of the spot of light produced by the light pointer within the field of view.

8. The thermal image system with optical indicator of claim 7, wherein the light spot represents an indication area having a diameter or side length greater than 5 CM; the light indicator is provided with a corresponding power supply control switch; the position of the mark is determined according to the angle of view of the lens, the angle between the optical indicator and the optical axis of the lens and the shooting distance; the thermal imaging device is provided with a distance measuring component.