Linear dispersion objective lens

A technology of objective lens and dispersion, applied in the field of objective lens, can solve the problems of complex structure of objective lens, large overall length, small degree of freedom, etc., and achieve the effects of small spherical aberration, large working distance, and improved performance

Active Publication Date: 2014-12-24
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method can only achieve a linear relationship between dispersion and wavelength between tightly coupled lenses. It is not suitable for dispersion objectives that require a large air gap and multi-stage magnification. The degree of freedom in design is small and the practicability is low.
The applicant once designed a practical dispersion objective lens based on this principle, but the structure of the objective lens is relatively complex and the overall length is relatively large (Optical Precision Engineering, 2013, 21(10): 2473-2479)

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
  • Linear dispersion objective lens
  • Linear dispersion objective lens
  • Linear dispersion objective lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The effective focal length (d light) of the linear dispersion objective lens is 17mm, the working distance is 30.2mm, and the dispersion between F light and C light is 0.68mm. The numerical aperture of this embodiment is 0.265, and the overall magnification is -0.256 times (the overall magnification from the object is -3.91 times). Objective lens data are given in Table 1.

[0034] Table 1 is the relevant parameters of the lens surface in Embodiment 1 of the linear dispersion objective lens of the present invention. reference table and figure 1 , starting from the pinhole 1 side, includes the following components: single lens L1 with negative power, single lens L2 with positive power, doublet lens L3 with positive power, doublet lens L4 with positive power. L1 forms the lens group G1 with negative refractive power, and L2, L3, and L4 form the lens group G2 with positive refractive power.

[0035] Table 1, X N =0.0807mm, X P =-0.0768mm,|X N +X P | / |X N |=0.048. ...

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

The invention provides a linear dispersion objective lens. Axial dispersion and the wave length approximately form a linear relation within the wavelength range from light F to light C. The linear dispersion objective lens has large dispersion, long working distance and small spherical aberration. The linear dispersion objective lens is composed of a positive lens assembly and a negative lens assembly, wherein the negative lens assembly is close to a needle hole and integrally has negative power, and the positive lens assembly is close to an object and integrally has the positive power. The surface, closest to the object, of the objective lens is a concave face, and the materials of the positive lens assembly and the materials of the negative lens assembly meet the certain dispersion correcting relation. The linear dispersion objective lens can provide large design freedom degree, is used for a spectrum confocal device, effectively improves the whole performance of the device, and is mainly applied to detection of displacement, the transparent element thickness, the micro three-dimensional structure and surface roughness and the like.

Description

technical field [0001] The invention belongs to the technical field of objective lenses, and in particular relates to a linear dispersion objective lens. The invention can be used in spectral confocal displacement sensors, spectral confocal microscopes and other devices using spectral confocal technology (Chromatic Confocal Technology), and is suitable for detection of displacement, thickness of transparent components, three-dimensional structure, surface topography and the like. Background technique [0002] Ordinary microscope objectives require the elimination of chromatic aberration, which can be achieved through a combination of various glasses. The dispersion objective lens used in spectral confocal technology is just the opposite, requiring as large aberration (dispersion) as possible to increase the detection range, usually using high dispersion glass to achieve this goal (Optoelectronic Engineering, 2011, 28(7): 131- 135). However, the linearity between the disper...

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 Applications(China)
IPC IPC(8): G02B13/00
Inventor 刘乾杨维川袁道成刘波蒋家东
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap