A lens with a given focal length f creates a radially varying phase delay for a laser beam according to the following equation: Δφ(r)=−πλfr2 This formula ignores the constant part of the phase change as well as aberrations. Note that depending on the function of the lens – for...
The difference between the reciprocals of the radii of curvature of the two surfaces of a lens. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc. The following article is fromThe Great Soviet Encyclopedia(1979). It might be outd...
The objective also has a third lens group which has at least one lens with positive refraction. The air gaps between the lenses of each group and the radii of curvature of the different lenses are defined by given mathematical formulae. USE - Lenses for optical scanners.ROTHE ERNST...
Yesterday I needed to evaluate the basic condition of a lens quick and dirty - no fancy equipment at my disposal. I decided to shoot some stills through it at a grassy field to get an idea of what field curvature the lens has and if there's any weird tilt. I was expecting a gentle ...
Yeah. I've got to go higher up. This point over here. And oh man, that really does not right at all. I think you have some liquid here. Maybe, look at that, contact lens fluid. Let's see if I can get it to work, eh sort of. Anyway you'll remember. Will you remember?
The method of designing a freeform lens which can image on a formula describable non-planar surface with low distortion was proposed aimed on distortion co... H Jia,H Li,Z Zheng,... - 《Optics Communications》 被引量: 28发表: 2012年 Thermal Forming Process for Precision Freeform Optical ...
understand the concepts of lens formula, magnification and power of lens concave lenses when an object is placed at infinity, a virtual image is formed at the focus. the size of the image is highly diminished and point size. when an object is placed at a finite distance from the lens, a...
Corneal power was calculated using standard keratometric indices of 1.337.5 or 1.331.5 and Javal-Schiotz keratometry. Corneal power was then recalculated using the thick-lens formula, with anterior corneal curvature from the Javal-Schiotz or Orbscan II and posterior measurements from the Orbscan II...
申请(专利权)人: SIEMENS AG 发明人: P Kluczynski 摘要: Curvature radii (R1,2) and spacing (d) of two lens surfaces (1,2) are dimensioned by specified formula, i.e. larger than 1 or less than zero. Both lens surfaces lie next to each other on optical axis (3).收藏...
实验一用牛顿环测透镜的曲率半径(Experiment 1 uses Newton rings to measure the radius of curvature of a lens).doc,实验一用牛顿环测透镜的曲率半径(Experiment 1 uses Newton rings to measure the radius of curvature of a lens) Data worth having From the usu