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

Vertomater

A focimeter and light source technology, applied in the field of focimeter, can solve the problem of rough adjustable range of lighting time

Inactive Publication Date: 2008-12-10
TOPUKON YAMAGATA +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in the above-mentioned conventional lensmeter, since the adjustable range of the lighting time of the light source is relatively rough, higher precision adjustment is required.

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
  • Vertomater
  • Vertomater
  • Vertomater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] Next, a preferred embodiment of the lens meter of the present invention will be described with reference to the drawings. figure 1 Shown is a configuration diagram of an embodiment of the lens meter of the present invention.

[0047] The lens meter 100 shown in the figure is provided with a liquid crystal display 2 on the front upper part of the main body casing 1, and at the middle part of the up-down direction of the main body casing 1, an upper frame body part 3 is protrudingly provided to the front. A lower frame body part 4 protrudes from the lower part, and on the upper surface of the lower frame body part 4, a substantially cylindrical lens holder 5 extending toward the upper frame body part 3 is provided. On this lens holder 5, the lens L to be inspected of the eyeglasses M is placed.

[0048] here, as figure 2 As shown, inside the upper frame body part 3, a projecting optical system 10 is provided for projecting the measuring beam (exiting beam) to the lens...

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

No PUM Login to View More

Abstract

PROBLEM TO BE SOLVED: To improve measurement accuracy of a refraction characteristic of a lens to be inspected by properly adjusting a received light quantity of light from a light source in a lens meter. SOLUTION: In the lens meter 100, the refraction characteristic of the lens L to be inspected is measured by projecting an outgoing beam emitted from an LED 13 (the light source) on the lens L to be inspected, and detecting transmission light transmitted through the lens L to be inspected by a CCD image sensor 11. It is provided with an arithmetic control circuit 24 (a light quantity control means) controlling a lighting time of the LED 13 by a clock signal (a drive signal) of a CCD drive circuit 19 driving the CCD image sensor 11. COPYRIGHT: (C)2006,JPO&NCIPI

Description

technical field [0001] The present invention relates to a focimeter, and in particular, relates to an improvement in the lighting operation of a light source of a focimeter that detects light quantity distribution using a CCD image sensor. Background technique [0002] In the traditional prior art, the focimeter projects the light beam emitted from the light source to the lens to be detected, and uses a light detection device to detect the light distribution of the light passing through the lens to be detected, and according to the detection result, Measure the refractive properties of lenses. [0003] Here, a CCD image sensor is used as a light detection device, and a light emitting diode (LED) is mainly used as a light source. [0004] However, the measurement of the refractive properties of the lens to be detected by the focimeter is performed based on the light intensity distribution (received light intensity distribution) detected by the CCD image sensor as described a...

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
CPCG01J1/00G01J2001/448G01M11/0207G01M11/0235G01N21/17
Inventor 国井正辉
Owner TOPUKON YAMAGATA
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