Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Optical glass, optical element and preform

A technology of optical glass and optical components, which is applied in the fields of optical glass, optical components and preforms. It can solve the problems of easy damage to glass and difficult handling of glass, and achieve the effects of increasing refractive index, reducing wear, and suppressing dispersion.

Active Publication Date: 2016-06-29
OHARA
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In addition, when using the glass disclosed in Patent Document 1, when an optical element is obtained by grinding a glass molded product after reheating and press molding, or when grinding a gob or a glass gob, the Glass is easily damaged, so glass handling is difficult

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
  • Optical glass, optical element and preform
  • Optical glass, optical element and preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0104] The composition and refractive index (n d ), Abbe number (ν d ), partial dispersion ratio (θg, F), anomalous dispersion (Δθg, F) ​​and wear degree are shown in Table 1. It should be noted that the following examples are for illustrative purposes only, and the present invention is not limited to these examples.

[0105] For the optical glass of the examples (No.1-No.5) of the present invention and the glass of the comparative example (No.1), oxides, carbonates, nitrates, fluorides, and metaphosphoric acid compounds corresponding to each component are selected. The high-purity raw materials used in common fluorophosphate glass are weighed and mixed uniformly according to the composition ratios of the examples and comparative examples shown in Table 1 as the raw materials of each component. Then put the mixture of raw materials into a platinum crucible, and according to the melting difficulty of the glass composition, melt it in an electric furnace at a temperature range...

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
refractive indexaaaaaaaaaa
Abbe numberaaaaaaaaaa
Abbe numberaaaaaaaaaa
Login to View More

Abstract

The present invention provides an optical glass, an optical element, and a preform that not only have a specific high refractive index and low dispersion (high Abbe number), but also are easy to polish and can correct the dispersion of a lens with higher precision. The optical glass of the present invention contains P, at least two or more alkaline earth metal elements and one or more rare earth elements as cationic components, O and F as anionic components; and has a refractive index (n) of not less than 1.50 and not more than 1.65 d ), with an Abbe number of 60 to 77 (ν d ). The invention also provides an optical element made of the optical glass.

Description

technical field [0001] The present invention relates to optical glass, optical element and preform. Background technique [0002] Usually, the lens system of an optical instrument is designed by combining multiple glass lenses with different optical properties. In recent years, in order to further expand the design freedom of lens systems of various optical instruments, optical glass with optical characteristics that cannot be used in the past has been used as optical elements such as spherical and aspheric lenses. In particular, glasses with various refractive indices and dispersion tendencies are being developed to reduce chromatic aberration in the entire optical system during optical design. Among them, optical elements made of optical glass with a high partial dispersion ratio (θg, F) ​​have high anomalous dispersion properties (Δθg, F) ​​as described below, so they can significantly correct the effect of chromatic aberration, And the degree of freedom of optical desi...

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): C03C3/04C03C3/247C03B11/08
Inventor 吉川健
Owner OHARA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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