10 ENGLISH BOOKS RELATING TO «VARIFOCAL»
Discover the use of
varifocal in the following bibliographical selection. Books relating to
varifocal and brief extracts from same to provide context of its use in English literature.
1
A History of the Photographic Lens
INTRODUCTION. A varifocal lens is one in which the focal length can be
continuously varied by moving one or more of the lens elements along the axis.
In such a system, the image position generally moves with a change in focal
length, but if ...
A 3D display produced by means of a varifocal mirror is shown in Fig. 16.21. A
varifocal mirror is made by stretching a thin aluminized Mylar film over a loud
speaker [16.13]. The radius of curvature of the Mylar film is varied by changing
the air ...
Infinity zoom When set at infinity, varifocal lenses act as true zooms—there is no
need to refocus as you change focal lengths. Top photo of building on Park A
venue in New York was taken at28-mm setting, one below it was done at 105-mm
.
4
Issues in Nanotechnology and Micotechnology—Engineering, ...
According to news reporting from Miyagi, Japan, by VerticalNews journalists,
research stated, “We present a varifocal scanning micromirror fabricated from a
silicon-on-insulator wafer. The varifocal scanning micromirror consists of a
varifocal ...
5
An Introduction to Computer Graphics and Creative 3-D ...
Varifocal. Mirror. Consider that an object is placed 80cm in front of a varifocal
mirror which has a diameter of 30 cm. Assuming that the peak to peak amplitude
of motion of the mirror is 4mm and considering onlytheportionof the mirror's
motion ...
6
Glossary of Mapping Science
Also called a pancratic optical system, varifocal lens, zoom lens and zoom optical
system. Varifocal optical systems are much used in television cameras and
copying cameras, as well as in some kinds of stereoscopic plotters. system, zoom
...
American Society of Civil Engineers, 1994
7
Mechanisms, Transmissions and Applications
C.M. Gruescu Abstract Varifocal objectives for imaging systems integrating CCD
sensors are useful in numerous applications, but there are no standards to
design such systems. The present paper proposes a varifocal objective, suited for
a ...
Erwin-Christian Lovasz, Burkhard J. Corves, 2011
8
3D: History, Theory and Aesthetics of the Transplane Image
Numerous sources on the use of volumetric displays on the basis of varifocal
mirror for imaging tomographic data can be found there. However, Eliasson's
application and alterations of the mirror is not completely original. Robert
Whitman had ...
9
Handbook of Optical Design, Third Edition
Am., 44, 684—691 (1954). Back, F. G. and Lowen, H., “Generalized Theory of
Optically Compensated Varifocal Systems,” J. Opt. Soc. Am., 48, 154—171 (1958
). Bergstein, L., “General Theory of Optically Compensated Varifocal Systems,” J.
Daniel Malacara-Hernández, Zacarías Malacara-Hernández, 2013
10
Evidence-Based Ophthalmology
... 0 0.62 l 9993' (control) 0 Varifocal add + l-5 o 0.88 o Varlfocal add + 20 o 0.33
Statiscally significant varifocal v control Shih er al., 227 188 6-13 16 0 Single
vision glasses 0 093 200132 o Varifocal 0 0-79 0 Varifocal +05% 0 0-14 Atropine
No ...
Richard Wormald, Katherine Henshaw, Liam Smeeth, 2008
10 NEWS ITEMS WHICH INCLUDE THE TERM «VARIFOCAL»
Find out what the national and international press are talking about and how the term
varifocal is used in the context of the following news items.
Asda takes on competitors over varifocals
Supermarket opticians Asda could trigger a price war between High Street opticians as it offers varifocal lenses for the same price as its single prescription ... «Optometry Today, Apr 15»
Asda plays up £144m pensioner 'eye tax'
The supermarket optician looked at the cost of varifocal prescriptions on the high street compared to single vision and described the findings as 'eye-watering'. «Optician Online, Apr 15»
Asda takes on High Street with £40 varifocal glasses
Varifocal lenses are worn by those who need help both with long distances, for example when driving, and reading, due to eye deteroriation which generally ... «Daily Mail, Mar 15»
'I walked around blind for 4 days after being given wrong varifocals'
"A few days later she rang and said there was nothing they could do – they couldn't put this prescription into that varifocal. "Asda said they could give me a ... «Grimsby Telegraph, Aug 14»
NuOptic Wins Again at ISC West, Las Vegas
NuOptic is once again recognized for its varifocal illumination technology while at ISC West in Las Vegas. Integrated solutions with Arecont security cameras and ... «PR Web, May 14»
'The secret is to shun the fancy extras': How to see through the sales …
VARIFOCALS: Modern progressive lenses have the same qualities as bifocals but are graduated without any dividing lines. Can include mid-vision for computer ... «This is Money, Apr 14»
Theia Technologies' C-Mount SL183 Ultra-Wide Varifocal Lens
The new varifocal lens will allow C mount camera users in the machine vision, automation, security, and broadcast markets more flexibility in wide coverage of ... «SecurityInfoWatch, Mar 14»
Channel Vision Adds 6821-O Varifocal Eyeball Camera
The Channel Vision 6821-O Varifocal Eyeball Dome Camera is now available in an oil-rubbed bronze finish and incorporates a Sony 700TVL CCD. The camera ... «CEPro, Jul 13»
Eddie Mair: My path towards death is becoming blurry
"As you'll know yourself if you're a varifocal person, you should never look at your feet when going downstairs... Certainly never wear varifocals, get drunk and ... «Radio Times, Jun 13»
Dahua Technology launches 2 megapixel IP camera with varifocal …
Dahua Technology recently launches 2MP full HD vandal-proof network dome cameras with varifocal motorised lens (IPC-HDB3202 & IPC-HDBW3202), one ... «SourceSecurity.com, Jan 13»
