Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Measuring Method for Measuring the Focal Length of Concave Lens

A measurement method and technology of concave lens, applied in the direction of testing optical performance, etc., can solve the problems of cumbersome measurement process and poor measurement accuracy, and achieve the effects of improving measurement accuracy, easy operation and simple structure

Active Publication Date: 2021-01-29
FUJIAN NORMAL UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The focal length is one of the most important parameters of a concave lens. The existing methods for measuring the focal length of a concave lens need to measure the object distance and image distance of the concave lens first. The measurement process is cumbersome and the measurement accuracy is poor.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Measuring Method for Measuring the Focal Length of Concave Lens
  • A Measuring Method for Measuring the Focal Length of Concave Lens
  • A Measuring Method for Measuring the Focal Length of Concave Lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] like Figure 1~3 As shown, a measurement method for measuring the focal length of a concave lens includes a sodium lamp, a light shield, a first convex lens, a grating, a second convex lens, a third convex lens, a concave lens to be tested and a micrometer eyepiece, and a rectangular light hole is arranged on the light shield , the measurement includes the following steps: (1) Along the incident direction of light, there are coaxial sodium lamps, shading plates, first convex lens, grating, third convex lens and micrometer eyepiece arranged in sequence, turn on the sodium lamp, and the light from the sodium lamp passes through the rectangular The light-through hole is incident on the first convex lens, passes through the first convex lens to form a beam of parallel light, and then the parallel light is vertically incident on the grating, diffracted by the grating, and then the diffracted light converges on the focal plane B of the third convex lens through the third conve...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
wavelengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to a measuring method for measuring the focal length of a concave lens, which comprises a sodium lamp, a light-shielding plate, a first convex lens, a grating, a second convex lens, a third convex lens, a concave lens to be tested and a micrometer eyepiece, and a rectangular light-through hole is arranged on the light-shielding plate , the focal length of the concave lens to be tested can be measured by Fraunhofer diffraction. The invention is simple in structure and easy to operate, can measure the focal length of the concave lens to be tested through Fraunhofer diffraction, and only needs to measure the interval of diffraction fringes without measuring the image distance and object distance.

Description

technical field [0001] The invention relates to a measuring method for measuring the focal length of a concave lens. Background technique [0002] Concave lens is a commonly used optical element and is widely used in optical systems. The focal length is one of the most important parameters of a concave lens. The existing methods for measuring the focal length of a concave lens need to measure the object distance and image distance of the concave lens first. The measurement process is cumbersome and the measurement accuracy is poor. Contents of the invention [0003] In view of this, the object of the present invention is to provide a method for measuring the focal length of a concave lens, which has a simple structure and is easy to operate, and can measure the focal length of the concave lens to be measured by Fraunhofer diffraction, and only needs to measure the spacing of the diffraction fringes without measuring Image distance and object distance, improve measurement ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/02
Inventor 翁存程冯尚源章小曼何友武
Owner FUJIAN NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com