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Focal point prompt board

A prompt board and focus technology, applied in the field of experimental equipment, can solve the problems of students' lack of deep impression and inconvenient comparison, and achieve the effect of improving the teaching effect

Inactive Publication Date: 2011-05-25
THE SECOND FOREIGN LANGUAGE SCHOOL AFFILIATED TO SHANGHAI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the convex lens is not always placed at the zero mark of the scale, to determine the focal length of the convex lens and the actual position of the double focal length, it must be calculated in advance. It is inconvenient to make direct comparisons during the experiment. Some rules do not impress the students deeply.

Method used

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Embodiment Construction

[0007] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0008] refer to figure 1 As shown, a focus prompting board of the present invention includes a glass plate 1 and a red round rod 3. A straight line 2 is drawn in the middle of the glass plate 1, and a high-brightness white light lamp is installed above the straight line 2. The glass When the board 1 is in use, a mouthful is drilled at the two focal points of the convex lens. The red round rod 3 is embedded in the small hole, and the red round rod 3 is also installed at the double focal length. .

[0009] The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the a...

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Abstract

The invention relates to a focal point prompt board, which comprises a glass board and red circular rods, wherein a straight line is drawn on the middle part of the glass board; a high-brightness white-light lamp is arranged above the straight line; a hole is drilled on two focal points of a convex lens on the glass board respectively; and the red circular rods are embedded into small holes and are arranged at the position of double focal distance. During an experiment, the focal point prompt board is very intuitional and can be easily compared with an object distance and an image distance to obtain an imaging rule, so that a student never forgets what is taught and teaching effect is enhanced.

Description

Technical field: [0001] The invention relates to an experimental appliance, in particular to a focus prompting board. Background technique: [0002] The experiment of "studying the imaging law of convex lens" in the middle school physics experiment is generally completed by using the optical bench. Students should determine the focal length, object distance, image distance and other positions when doing their hands-on work, and often compare them with the focal length and double focal length, but these distances are all on the scale below. Since the convex lens is not always placed at the zero mark of the scale, to determine the focal length and the actual position of the double focal length of the convex lens, it must be calculated in advance. It is inconvenient to make direct comparisons during the experiment, and some rules do not impress the students deeply. Invention content: [0003] In order to solve the above problems, the present invention provides a focus prompt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/22
Inventor 徐勇
Owner THE SECOND FOREIGN LANGUAGE SCHOOL AFFILIATED TO SHANGHAI NORMAL UNIV
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