SCHOTT AG - SCHOTT Lighting and Imaging

Dental Applications Faceplates

Faceplates...

Fused Fiber Optic Faceplates

Image Inverters; Step Plates; Radius Plates; Strip Plates; Hydrogen-fired Plates

SCHOTT's Fiber Optic Faceplates are used for high resolution, zero thickness image transfer in applications that include CCD coupling, CRT / LCD displays, image intensification, remote viewing, field flattening and x-ray imaging. In opto-electronic applications, faceplates are used as both input and output image intensifier windows. All SCHOTT Faceplates are fabricated to customer-specific requirements. Typical customized shapes range from round to rectangular and vary in sizes up to 150 mm in diameter; typical element sizes range from as small as 4.0 µm up to 25 µm or larger; standard numerical apertures (NA) is 1.0 Faceplates are manufactured to meet vacuum tube requirements. They are also manufactured with various coefficients of thermal expansion to meet customer's needs.

Special Materials

Small micron size elements
Radiation resistant materials

Radiation Resistant 47ARH Faceplates

SCHOTT Lighting and Imaging 47ARH Faceplates are produced using a core glass which substantially improves radiation resistance, yet retains the properties required for use as windows in image intensifier tubes and similar applications. Faceplates made with 47ARH material can withstand exposures of up to 100 rads of x-radiation, without significant darkening.

General Specifications

Material SCHOTT Standard 47

with or without EMA. Compatible with phosphors and photocathodes. CTE 68 x 10-7/°C. Seals to Niromet 44 using Corning 7578 frit.

SCHOTT Standard 24

with or without EMA. Compatible with phosphors. CTE 68 x 10-7/°C. Seals to Niromet 44 using Corning 7578 frit.

SCHOTT Standard 73

CTE 89 x 10-7/°C. Seals to G12 glass.

SCHOTT Standard 283

CTE 62 x 10-7/°C.

Fiber Size / Theoretical Resolution for standard materials

4.0 µm/ 144 lp/mm
6 µm/102 lp/mm
10 µm/ 50 lp/mm
25 µm/ 24 lp/mm

Numerical Aperture

1.0

Vacuum Integrity

Per customer specification

Material Quality

Chicken Wire, blemishes and distortions (gross & shear). Will quote customer requests.

Surface Quality

Polished surfaces are controlled by the scratch/dig tolerance of MIL-O-13830A and meet a 20/10 scratch/dig tolerance.

Surface Flatness

Will quote customer requests.

Typical Faceplate Specification

Glass Type Typical Performance Parameters	47A	283C	73A	24A	24
Element Size(um)/ Resolution (lp/mm)	6/102	6/102	6/102	6/102	6/102
Numerical Aperture	1.0	1.0	1.0	1.0	1.0
Stray Light Control (EMA)	Yes	No	Yes	Yes	No
Collimated Transmission White Light: 3 mm Thick 10 mm Thick	72 70	81 78	68 62	65 58	85 44
Lambertian Transmission 3 mm Thick 10 mm Thick	64 60	79 76	60 54	59 53	85 44
Coefficient of Thermal Expansion (x 10-7/°C)	68	59	89 94	68	68
Phosphor Compatible	Yes	Yes	Yes	Yes	Yes