Influence of the refractive index and dispersion of spectacle lens on its imaging properties

Optik ◽  
2007 ◽  
Vol 118 (12) ◽  
pp. 584-588 ◽  
Author(s):  
Antonin Miks ◽  
Jiri Novak ◽  
Pavel Novak
Keyword(s):  
Refractive Index ◽  
Spectacle Lens ◽  
Imaging Properties

Experimental far-field imaging properties of high refractive index microsphere lens

2015 ◽  
Vol 3 (6) ◽  
pp. 339 ◽  
Author(s):  
Minglei Guo ◽  
Yong-Hong Ye ◽  
Jinglei Hou ◽  
Bintao Du
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Far Field ◽  
Imaging Properties ◽  
Field Imaging

scholarly journals Convergence Study of High Refractive Index Polarized Glasses Lens with Photochromic and UV Blocking Function

2021 ◽  
Vol 11 (11) ◽  
pp. 114-122
Author(s):  
Doo Hee Han ◽  
Keyword(s):  
Refractive Index ◽  
Blue Light ◽  
Ultra Violet ◽  
High Refractive Index ◽  
Property A ◽  
Light Reaction ◽  
Spectacle Lens ◽  
Uv Blocking ◽  
Light Region ◽  
Uv Rays

Those who use convex or concave lenses should use sunglasses made from regular spectacle lenses. In this case, it uses a surface coating to block UV rays, so it is relatively vulnerable to UV protection. To this end, we developed a spectacle lens that can completely block ultraviolet light and suppress blue light by using a monomer that completely blocks the area below 410 nm and has a sunglasses function through photochromic function. A spectacle lens with photochromic, polarization and UV blocking functions was developed using a monomer with a high refractive index of 1.67. In the photochromic property, a recovery time of 2 minutes for light reaction and 5 minutes for dark reaction was obtained. Five layers of anti-reflection coating were applied to the surface of the lens to reduce the transmittance in the visible light region to 0.1 or less. ITO was applied to give an electromagnetic wave shielding function, and the thickness and conductivity of ITO were proportional to the result. The blue light emitted from the LED is reduced by more than 30% to reduce eye fatigue. UV rays were completely blocked below 410 nm. Keywords—Ultra violet, Blue light, Sunglass, Photochromic, Eyeglass lenses

Imaging properties in two-photon excitation microscopy and effects of refractive-index mismatch in thick specimens

1999 ◽  
Vol 38 (28) ◽  
pp. 5995 ◽  
Author(s):  
Cees J. de Grauw ◽  
Jurrien M. Vroom ◽  
Hans T. M van der Voort ◽  
Hans C. Gerritsen
Keyword(s):  
Refractive Index ◽  
Two Photon ◽  
Photon Excitation ◽  
Imaging Properties ◽  
Two Photon Excitation

Optical and imaging properties of a novel multi‐segment spectacle lens designed to slow myopia progression

2020 ◽  
Vol 40 (5) ◽  
pp. 549-556
Author(s):  
Matt Jaskulski ◽  
Neeraj K Singh ◽  
Arthur Bradley ◽  
Pete S Kollbaum
Keyword(s):  
Myopia Progression ◽  
Spectacle Lens ◽  
Imaging Properties

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

Light microscopy of ceramics

1993 ◽  
Vol 51 ◽  
pp. 908-909
Author(s):  
Walter C. McCrone
Keyword(s):  
Refractive Index ◽  
Light Microscopy ◽  
Light Microscope ◽  
Polarized Light ◽  
Refractive Indices ◽  
Complete Coverage ◽  
The Subject ◽  
Lower Refractive Index

An excellent chapter on this subject by V.D. Fréchette appeared in a book edited by L.L. Hench and R.W. Gould in 1971 (1). That chapter with the references cited there provides a very complete coverage of the subject. I will add a more complete coverage of an important polarized light microscope (PLM) technique developed more recently (2). Dispersion staining is based on refractive index and its variation with wavelength (dispersion of index). A particle of, say almandite, a garnet, has refractive indices of nF = 1.789 nm, nD = 1.780 nm and nC = 1.775 nm. A Cargille refractive index liquid having nD = 1.780 nm will have nF = 1.810 and nC = 1.768 nm. Almandite grains will disappear in that liquid when observed with a beam of 589 nm light (D-line), but it will have a lower refractive index than that liquid with 486 nm light (F-line), and a higher index than that liquid with 656 nm light (C-line).

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