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A lens imaging experimental device with the function of automatically displaying the focus state

An automatic display and experimental device technology, applied in the field of optical experiments, can solve problems such as unstable data, low precision, and shaking of the adjustment instrument, so as to facilitate the identification of the best focusing position, intuitive numerical display, and high reliability Effect

Active Publication Date: 2022-04-29
WEIFANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the experiment, the light source and the image screen were placed on both sides of the lens assembly, and the distance between the light source or the image screen and the lens assembly was moved to make the light source form a clear image on the image screen, and then in actual operation, it was often adjusted while The position of the optical device, while observing the clarity of the image with the naked eye, determines whether the focal length is aligned. This adjustment method has disadvantages such as low precision and slow speed; in addition, there are currently photosensitive sensors installed on the image screen to measure the light intensity. Change, so as to determine the focus position, but this measurement method is easily affected by the shaking caused by the adjustment of the instrument, and has the disadvantages of low accuracy and unstable data

Method used

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  • A lens imaging experimental device with the function of automatically displaying the focus state
  • A lens imaging experimental device with the function of automatically displaying the focus state
  • A lens imaging experimental device with the function of automatically displaying the focus state

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a lens imaging experimental device with the function of automatically displaying the focusing state includes an optical bench 1, on which a guide rail 2 is arranged, on which an object screen assembly 3 and a lens are sequentially slidably installed. As for the component 4 and the image screen component 5 , a ruler is also arranged on the optical bench for measuring the distance between each component to obtain the imaging law of the lens component 4 .

[0030] see figure 2 and image 3 , the object screen assembly 3 includes an object screen housing 31 slidingly installed on the guide rail 2, and the object screen housing 31 is rotatably mounted with a rotating wheel 32 near the side of the lens assembly 4, and the object screen housing The body 31 is provided with a driving motor 33 connected to the rotating wheel 32 for driving the rotating wheel 32 to rotate. The rotating speed of the driving motor 33 can be adjusted in the range of 5-1...

Embodiment 2

[0039] The structure of the second embodiment is basically the same as that of the first embodiment, the difference is that the structure of the photosensitive module 55 is different, specifically: the photosensitive module 55 includes a photosensitive sensor 554 installed on the image screen housing 3, and the photosensitive module 55 The sensor 554 is in the same plane as the imaging area 54 and corresponds to the imaging position of the fan-shaped area.

Embodiment 3

[0041] The structure of the third embodiment is basically the same as that of the first embodiment, the difference is that the central part of the outer surface of the rotating wheel 32 is sunken inward to form a sunken area, and the sunken area is provided with a circular object screen 37 for displaying patterns, so The bottom end of the circular object screen 37 is fixed on the object screen casing 31 through a connecting portion 38, and the outer surface of the circular object screen 37 is in the same plane as the outer surface of the light passing area, so The circular object screen 37 is a light box.

[0042] A display area 54 is also provided on the surface of the image screen housing 51 near the side of the lens assembly 4, and the display area 54 corresponds to the circular object screen 37, and the circular object screen The patterns on 37 are displayed in the imaging area 54 after passing through the lens assembly 4 .

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Abstract

The invention discloses a lens imaging experiment device with the function of automatically displaying a focus state. The assembly includes an object screen shell, a rotating wheel is rotatably installed outside the object screen shell on the side close to the lens assembly, a driving motor is disposed in the object screen shell, and a light source for generating optical signals is also disposed in the object screen shell, and the rotating wheel There is a light passing area in a ring structure around the edge of the outer surface, and the light source corresponds to the light passing area; the image screen assembly includes an image screen casing slidably installed on the guide rail, and the image screen casing is provided with a photosensitive module, pulse interval measurement Comparison module and minimum pulse interval display module. In the process of lens experiment adjustment, the clearer the focus, the smaller the number displayed by the minimum pulse interval display module, so it can be used as a reference to focus in turn, which is more convenient and accurate to use.

Description

technical field [0001] The invention relates to the technical field of optical experiments, in particular to a lens imaging experimental device with the function of automatically displaying the focusing state. Background technique [0002] Lens component imaging experiment is an important physical experiment in middle school textbooks. The purpose of the experiment is to help students understand the imaging law of lens components through experiments. At present, the lens assembly imaging experiment device is mainly composed of an optical bench, a lens assembly, a light source and an image screen arranged on the optical bench. During the experiment, the light source and the image screen were placed on both sides of the lens assembly, and the distance between the light source or the image screen and the lens assembly was moved to make the light source form a clear image on the image screen, and then in actual operation, often while adjusting The position of the optical device...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/22G02B27/62G02B7/36
CPCG09B23/22G02B27/62G02B7/36
Inventor 戴长志赵加强曹连振
Owner WEIFANG UNIVERSITY