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CREATING NEW OPTICAL DESIGN

LOW DISTORTION HIGH TRANSMITTANCE SIMPLE AND COMPACT OPTICAL DESIGN


COUPLED TO CCD AS INPUT WINDOW

NEW OPTICAL DEVICE TO REPLACE LENS
Fiber optic plate (FOP) is optical device bundling optical fibers having several micro-meters in diameter. It will transfer the light and image with high efficiency and low distortion, which allows it as the better replacement of optical lens. In addition, it has no necessity to consider the focal point like optical lens, which can make the optical design simple and compact. Hamamatsu will offer the variation in the high definition type having minimum fiber size of 3 micro-meters and in the magnification size of 3: 1 maximum for tapered type.

SECURITY CHECK (FINGER PRINT IDENTIFICATION) HIGH RESOLUTION VIDEO CAMERA SURVEILLANCE CAMERA MEDICAL X-RAY CAMERA etc.

High spatial resolution High transfer efficiency Low image distortion Enable compact optical design Enable magnification/ reduction of image

FACSIMILE PHOTO COPY MACHINE BANK NOTE SORTER etc.
COUPLED TO LINEAR/TWO DIMENSIONAL MOS LINEAR IMAGE SENSOR

LIQUID CRYSTAL PROJECTOR CRT FACEPLATE LIQUID CRYSTAL FACEPLATE etc.
AS CRT FACEPLATE

OPTICAL PRINCIPLE AND CONSTRUCTION
A fiber optic plate has a multi fiber construction that bundles single fiber of several micro-meters in diameter. Each single fiber consists of a core glass conveying light, a clad glass covering the core glass and an E.M.A. that absorbs light leakage from the core glass. (Refer to the picture.) A single fiber conveys light with reflection at the border caused by difference in the refractive indexies between the core and the clad glass. As shown in the right picture when light enters at over the max. acceptance angle 1 (dotted line ), it does not get internally reflected and thus passes out of the fiber. However, it is absorbed by the E.M.A. and it does not reach the next single fiber. Therefore the resolution is not degraded and optical images can be conveyed without cross talk. In addition, as tapered fiber optics consist of many tapered single fibers, reduced (magnified) input image can be conveyed with the same ratio.
CLADDING n1 n0
1

TAPERED FIBER OPTICS
2.54

25

15.2

AIR n=1

CORE

CORE

EXTRA MURAL ABSORPTION (E.M.A.)

13.6

CLADDING

FOP developed for the window of CCD having higher spatial resolution. There is almost no image quality degradation while light transmission to CCD element because it has fiber diameter size of 3µm which is half of pixel size of CCD having best spatial resolution.
(Unit: mm)

6.9

12.5

25

7.5

(Unit: mm)
TMCPA0047EA TMCPA0048EA

TMCPC0071EA

6.0

15

3µm FOP FOR 2/3 INCH CCD WINDOW

Transfered image can be magnified/reduced so that each fiber is tapered with same ratio. It will allow to make the large size image condensed into CCD element, with using tapered fiber optics as the window material, which enables to support the magnification of CCD imaging area.


NEW OPTICAL DEVICE TO REPLACE LENS

FIBER OPTIC PLATES LINE UP
FIBER OPTIC PLATES Fiber Diameter Numerical Aperture (N. A.) Resolution Extra Mural Absorption (E. M. A.) Collimated Light Transmittance Lambertian Light Maximum Useful Area Thermal Expansion Coefficient Frit Type Sealing Metal Photocathode Phosphor Screen Vacuum Integrity Tapered Ratio Application -- NO 85 85 180 85 Corning 7575 Carpenter 49 (Metal) YES YES 3 1.0 161 YES 79 60 6 1.0 102 YES 73 63 180 85 YES 74 38 124 0.88 25 0.55 28.5 YES 70 14 66 96 Corning 7576 Corning 9008 (Glass) NO YES < 1 в 10-5 Pa.cc.He/s (< 1 в 10-10 atm.cc.He/s) -- -- . CRT . Facsimile . Photo Copy Machine 2: 1 . CCD . LCLV, CRT . Input/Output Window of Image Tubes YES 60 5 40 0.35 TAPERED FIBER OPTICS 6 1.0 102 YES 61 29 180 85 Corning 7575 Carpenter 49 (Metal) YES YES UNIT µm -- lp/mm -- % % degree в 10-7/°C -- -- -- -- -- --

. CCD . LCLV, CRT . Input/Output Window of Image Tubes

--

Test chart USAF 1951 FOP: t = 3mm, Wavelength = 550nm Upto 3: 1 ratio upon request

Tapered Fiber Optics: t = 15mm, Wavelength = 550nm

PRECAUTION FOR USE
Please take care the handling of FOP so that it is the precision optical device.

Keep the surface of FOP clean Stains on effective area may be the reason of degradation in transparent ratio. Wipe out it with alcohol, if any. Handle FOP carefully FOP is made from glass material. Please don't give the scratch or shock to it. Keep FOP in the storage under dry condition Keep in the storage under the condition same as general optical device. Use the coupling material when it is coupled each other Direct coupling with another FOP's may generate the scratch on the surface of FOP. Please use the coupling material like silicon oil for it.
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©1998 Hamamatsu Photonics K.K

HAMAMATSU PHOTONICS K.K., Electoron Tube Center 314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 France: Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 United Kingdom: Hamamatsu Photonics UK Limted: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone: (44)181-367-3560, Fax: (44)181-367-6384 North Europe: Hamamatsu Photonics Norden AB: FДrЖgatan 7, S-164-40 Kista Sweden, Telephone: (46)8-703-29-50, Fax: (46)8-750-58-95 Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 TMCP1005E02

OCT. 1998. IP (9309)