CN-224232049-U - Desktop far image read-write equipment with visual virtual image distance

CN224232049UCN 224232049 UCN224232049 UCN 224232049UCN-224232049-U

Abstract

The utility model discloses desktop far image reading and writing equipment with a visible virtual image distance, which comprises a far image optical system, a distance sensor, a controller, a distance measurement reference object and display equipment, wherein the far image optical system is used for forming an amplified virtual image on an object placed on a desktop, the distance measurement reference object is arranged on the desktop below the distance sensor or a plane with a fixed height from the desktop, the distance sensor is used for collecting the distance d from the bottom of the desktop far image reading and writing equipment to the distance measurement reference object, and the controller is used for obtaining the virtual image distance l 'of the far image optical system according to the distance d from the bottom of the desktop far image reading and writing equipment to the distance measurement reference object and displaying the virtual image distance l' through the display equipment. According to the desktop far-image reading and writing device, the distance sensor, the distance measurement reference object and the display device are additionally arranged, the distance from the desktop to the far-image optical system is measured by using the uniform distance measurement reference object, the influence of different desktop conditions on the measurement result is avoided, and the stability of the virtual image distance measurement result is ensured.

Inventors

WANG LIANBING
QI JI
LI GUOFENG
YU AN

Assignees

北京耐德佳显示技术有限公司

Dates

Publication Date: 20260512
Application Date: 20250319

Claims (8)

1. The desktop far image read-write equipment with visual virtual image distance is characterized by comprising a far image optical system, a distance sensor, a controller, a distance measurement reference object and a display device: The far-image optical system is used for forming an enlarged virtual image for an object placed on the tabletop; The distance measurement reference object is arranged on a table top below the distance sensor or a plane with a fixed height away from the table top, the area of the distance measurement reference object is larger than the signal acquisition range of the distance sensor, and the surface reflectivity of the distance measurement reference object is at least larger than 10%, the distance measurement reference object is a label, the label comprises a glue layer, a label main body and a surface protection layer, the label is stuck on the table top through the glue layer at the bottom, and the position of the surface of the label is used as a detection point; The distance sensor is used for collecting the distance d from the bottom of the desktop far-image reading-writing equipment to the ranging reference object; And the controller obtains a virtual image distance l 'of the far-image optical system according to the distance d from the bottom of the desktop far-image reading and writing device to the distance measurement reference object, and displays the virtual image distance l' through the display device.
2. The desktop remote image read-write apparatus of claim 1, wherein: The far-image optical system is also used for forming an enlarged defocused image for an object placed on the tabletop; and the controller obtains defocus D corresponding to the image distance of the defocus image according to the distance D from the bottom of the desktop far image reading and writing device to the distance measurement reference object, and displays the defocus D through the display device.
3. A desktop remote image read-write device according to claim 1 or 2, characterized in that: And the ranging reference object is provided with a prompt or a mark related to the pasting information and/or the ranging signal acquisition information.
4. A desktop remote image read-write device according to claim 1 or 2, characterized in that: The thickness of the ranging reference object is not more than 0.5mm.
5. The desktop remote image read-write apparatus of claim 1, further comprising: a housing for accommodating the tele-imaging optical system and for fixing the distance sensor, the controller and the display device; And the bracket is fixedly connected with the shell and used for adjusting the distance between the shell and the tabletop.
6. The desktop remote image read-write apparatus of claim 5, wherein: the distance sensor is arranged at the bottom of the shell facing the desktop.
7. The desktop remote image read-write apparatus of claim 5, wherein: the distance sensor is arranged at a position far away from the shell and the bracket through the mounting piece.
8. The desktop remote image read-write apparatus of claim 7, wherein: The signal acquisition area of the distance sensor is not coincident with the area below the tele-image optical system.

Description

Desktop far image read-write equipment with visual virtual image distance Technical Field The utility model relates to desktop far-image read-write equipment. Background The problem of myopia in teenagers is increasing, and the root cause is that eyes of teenagers are focused in a relatively close range at most time, and the axes of the eyes are gradually prolonged to adapt to close-range imaging. In order to solve the problem, various myopia prevention and control products are developed on the market. The desktop far-image reading and writing equipment is equipment for imaging far from near reading and writing to far through optical means, and is mostly applied to the field of myopia prevention and control of teenagers. The desktop far-image reading and writing device is generally applied to teenagers and children, and is generally matched with a bracket with adjustable height to adapt to users with different heights. However, when the height of the support is adjusted, the distance from each optical element in the desktop far-image reading and writing device to the desktop changes, so that the virtual image distance of the desktop far-image reading and writing device changes simultaneously. For a desktop far-image read-write device with an out-of-focus light path, the out-of-focus level is changed simultaneously. For a user using the desktop far-image reading and writing device as myopia management application, the virtual image distance of the desktop far-image reading and writing device with a single focal plane and the virtual image distance and the defocus of the desktop far-image reading and writing device in a far-image scheme with a defocus optical path are closely related to myopia prevention and control effects and user experience comfort, belong to important indexes which are closely focused by the user, but no solution for concisely, intuitively and accurately reflecting the change of the virtual image distance and the defocus exists at present. Disclosure of Invention The primary technical problem to be solved by the utility model is to provide a desktop far-image reading and writing device with a visual virtual image distance, which is used for monitoring and displaying the virtual image distance. In order to achieve the technical purpose, the utility model adopts the following technical scheme: A desktop far image read-write equipment with visual virtual image distance comprises a far image optical system, a distance sensor, a controller, a distance measurement reference object and a display device: the far-image optical system is used for forming an enlarged virtual image for an object placed on the tabletop; The distance measurement reference object is arranged on a table top below the distance sensor or a plane with a fixed height from the table top, and the area of the distance measurement reference object is larger than the signal acquisition range of the distance sensor; The distance sensor is used for collecting the distance d from the bottom of the desktop far-image reading-writing equipment to the ranging reference object; And the controller obtains a virtual image distance l 'of the far-image optical system according to the distance d from the bottom of the desktop far-image reading and writing device to the distance measurement reference object, and displays the virtual image distance l' through the display device. Preferably, the far-image optical system is further configured to form an enlarged out-of-focus image of an object placed on the tabletop; and the controller obtains defocus D corresponding to the image distance of the defocus image according to the distance D from the bottom of the desktop far image reading and writing device to the distance measurement reference object, and displays the defocus D through the display device. Preferably, the reflectivity of the ranging reference object is at least greater than 10%. Preferably, the ranging reference object is a label comprising a glue layer, a label body and a surface protection layer. Preferably, the distance measurement reference object is provided with a prompt or a mark related to the pasting information and/or the distance measurement signal acquisition information. Preferably, the thickness of the ranging reference object is not more than 0.5mm. Preferably, the desktop far-image read-write device further comprises: a housing for accommodating the tele-imaging optical system and for fixing the distance sensor, the controller and the display device; And the bracket is fixedly connected with the shell and used for adjusting the distance between the shell and the tabletop. Preferably, the distance sensor is arranged at the bottom of the housing facing the table top. Preferably, the distance sensor is disposed at a position remote from the housing and the bracket by a mount. Also, preferably, a signal acquisition region of the distance sensor and a region under the tele-image optical system do not coincide. The desktop