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Browse Prior Art Database

LENS DESIGN WITH VARIABLE MAGNIFICATION

IP.com Disclosure Number: IPCOM000024015D
Original Publication Date: 1979-Jun-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 193K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a lens design having a fixed focal length (f/8) and a variable magnification range (lx .647X). The four-element lens has design parameters as follows (dimensions are in millimeters): Lens Element

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XEROX DISCLOSURE JOURNAL

LENS DESIGN WITH VARIABLE

MAGNIFICATION George L. McCrobie

Proposed Classification
U.S~Cl. 350/184 mt. CI. G02b 3/00

Disclosed is a lens design having a fixed focal length (f/8) and a variable magnification range (lx .647X). The four-element lens has design parameters as

follows (dimensions are in millimeters):

Lens Element T Glass

SF18

SF18

SF18

SF18

APERTURE STOP

1 66.8207 50.2269 26.2180

6.4102

75.2888 122.7817 6.000
8.000

APERTURE STOP

8.000

6.2997

7.4846

19.5876

2

3 -130.5294 -82.9850

4 -48.6962 -59.3873

P05. 1

= 284.63

= 237.85

= 256,70

= 27.93

= 521.07

= 1143.00

P05. 2 P05, 3

EFL BFL FFL Obj. Distance

Image Distance Total Track

Semi-Field Angle =

284.63

237.85

256.70

82.15

475.52

1151.67

18.92

284.63

237.85

256.70

183.22

420.59

1197.82

16.46

17.54

Volume 4 Number 3 May/3une 1979 383

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                  XEROX DISCLOSURE JOURNAL 3~4 Volume 4 Number 3 May/3une 1979

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