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M edical T V applications / XQ 13 9 5
DATASHEET
1" High Resolution Resistron(R) - Camera Tube XQ 1395
For use in medical TV application Antimonytrisulfide - photoconductive layer (Sb2S3) Separate mesh connection (grid-4-electrode)
Description
Camera Tubes are the key component of High Performance X-ray TV systems in medical applications. Their high sensitivity and high dynamic range combined with high resolution allows real-time x-ray imaging for any type of medical imaging as during critical surgeries. The Resistron(R) camera tube XQ 1395 is a 1" diameter image tube with magnetic focusing and magnetic deflection method for camera installations adapted through optics to X-ray image intensifiers.
Features and Benefits
High sensitivity Video high-resolution High dynamic range Real-time X-ray imaging Low noise imaging
Applications
Radiography Cardiology C-arm Angiography Radiosurgery
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DATASHEET
Table of Contents
Physical Dimensions of XQ 1395 __________________________________ 3 Typical Operating Data and Characteristics XQ 1395 __________________ 3 Maximum Ratings (absolute values)________________________________ 4 Blemish Specification ___________________________________________ 5 - Test Conditions_______________________________________________ 5 - Target Zone _________________________________________________ 5 Possible Number, Size and Location of Blemishes_____________________ 5 Characteristics of Spectral Sensitivity. Current, Modulation Depth and Lag__ 6
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DATASHEET
Physical Dimensions of XQ 1395
(All dimensions in mm)
Figure 1
Image Tube dimensions
Description Max. length Max. diameter Faceplate thickness Weight Base Socket Focusing and deflection assembly Mounting position
Parameter 162 mm 28.6 mm 2.45 0.15 mm approx. 60 g 8 pin special type 1030 (for printed circuits) 1031 (with solder tags) BV 200, BV 400 any
Typical Operating Data and Characteristics XQ 1395
Description Heater voltage Heater current Grid no. 1 voltage Grid no. 1 cut-off voltage Grid no. 2 voltage Grid no. 3 voltage Grid no. 4 voltage Blanking voltage applied to grid no. 1 Blanking voltage applied to cathode Focusing method Deflection method Inter-electrode capacitance - signal electrode to all other electrodes Scanned area with a 3:4 aspect ratio Useful diameter of the photoconductive layer Signal electrode voltage Spectral response Gamma value Resolution of center picture (grid 3=620 V, grid 4=860 V) Parameter 6.3 V (1) 95 mA (1) indirect by AC or DC, series or parallel supply see operating instructions point 2.5 -50 ... -100 V 300 V 560 ... 645 V (2) 860 V (2) 75 Vp-p 25 Vp-p magnetic magnetic 3 - 5 pF (3) 15.0 x 20.0 mm approx. 17 mm 20 .... 50 V (4) see diagram 0.7 0.15 > 60 lp/mm (5)
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DATASHEET
Maximum Ratings (absolute values)
Full size scanning of the 15.0 mm x 20.0 mm area of the photoconductive layer must be assured.
Description Grid no. 1 voltage positive Grid no. 1 voltage negative Grid no. 2 voltage Grid no. 2 load Grid no. 3 voltage Grid no. 4 voltage Peak heater-cathode voltage heater negative with respect to cathode heater positive with respect to cathode Faceplate temperature Parameter max. 0 V max. -150 V max. 450 V max. 0.8 VA max. 900 V max. 1000 V max. 125 Vp max. 10 Vp max. 70 (12) C
(1) If the maximum variation of the heater voltage exceeds the absolute limit of 5 %, the operating performance of the tube will be impaired and its life shortened. If series connection is applied, the heater voltage may not exceed 9.5 V. It is recommended to use a current limiter. The preheating time of the tube should be 1 minute minimum with beam current off. (2) Optimum focusing of the electron beam is obtained by adjusting either the focusing coil current or varying grid no. 3 voltage. Grid no. 3 voltage should be between 65 and 75 % of the voltage applied to grid no. 4 voltage. Optimum resolution is obtained by highest grid no. 4 voltage. Higher grid no. 4 voltage requires an increase of deflection current. If grid no. 3 voltage is increased, a higher focusing current will be necessary. The optimum ratio of grid no. 4 to grid no. 3 voltage depends on the type of focusing and deflection assembly. An improper voltage ratio may produce brightening or darkening in the faceplate corners. Generally, grid no. 4 voltage must be higher than grid no. 3 voltage. (3) This capacitance which is the effective output impedance of the tube (resistive component approx. 100 M ) increases if the tube is mounted in the focusing and deflection assembly. (4) The upper limit of the signal electrode voltage must be adjusted to the value indicated in the test sheet. This value applies to a faceplate temperature of 30 2 To obtain an C. optimum life time the dark current should not exceed the value of 30 nA. (5) Measured with video amplifier of suitable bandwidth. (6) At a color temperature of 2856 K. (7) The signal current is the target output current, measured with an integral measuring instrument, minus dark current. During the measurement the scanned area is uniformly illuminated. (8) Non-uniformity of the signal current depends on the quality of focusing and deflection assembly, deflection linearity and beam alignment. The black to white transition in the middle of the test pattern is set as 100 % value. The maximum signal deviations within a radius of 6.4 mm are measured. (9) The modulation depth is measured at the faceplate center at 20 lp/mm in comparison with 1.3 lp/mm. The modulation depth depends on the signal current. The signal current amounts to 200 nA, the beam current is adjusted for stabilising a signal of 500 nA. (10) The decay lag is measured in percent of the signal current, which is preset at 250 nA. The beam current is adjusted for stabilising a signal of 500 nA.
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DATASHEET
Blemish Specification - Test Conditions
The tube shall be centred and focused according to the operating and adjusting instructions for optimum performance. Illumination should be adjusted to a signal current of 250 nA at a beam current for stabilising a signal of 500 nA.
- Target Zone
A uniformly illuminated field with an aspect ratio of 3:4 and a scanned area of 15.0 mm x 20.0 mm shall be displayed on the target of the camera tube. According to the following drawing the scanned area is divided into three zones 1, 2 and 3. The blemish size is measured in percent of the picture height. The equivalent numbers of TV-lines are indicated for comparison purposes only. Black and white spots are equally weighted. Measurement of blemishes will be performed with and without target illumination. The minimum separation between two target spots must be greater than the diameter of the larger one, otherwise the combination is considered as a whole. Target spots with a diameter 0.2 % of the picture height as well as blemishes with a modulation depth 10 % are not counted, unless an accumulation causes a smudged appearance. Blurred spots, streaks, stripes, mesh defects and mottled or grainy background are only permitted up to a noise amplitude of 10 %.
Figure 2
20 mm 10 mm 15 mm 5 mm Zone 1 Zone 3 Zone 2
Target Zone of Image Tubes
Possible Number, Size and Location of Blemishes
Specification Blemish size in % of picture height Blemish size TV lines 15.0mm = 100 % 625 line system > 0.7 >4 > 0.5 ... 0.7 >3...4 > 0.2 ... 0.5 >1...3 Max. permissible total number of blemishes Maximum permissible number of blemishes Zone 1 Zone 2 Zone 3 0 0 0 0 0 2 4 0 1 4
Blemishes outside the zone are not counted.
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DATASHEET
Characteristics of Spectral Sensitivity. Current, Modulation Depth and Lag
Typical behaviour of the image tubes XQ 1395 are shown in the following figures:
Figure 3
Key characteristics of Image Tubes
Worldwide Headquarters PerkinElmer Optoelectronics 44370 Christy Street Fremont, CA 94538-3180 Telephone: +1 510-979-6500 Toll free: (North America) +1 800-775-OPTO (6786) Fax: +1 510-687-1140 Email: opto@perkinelmer.com www.optoelectronics.perkinelmer.com
European Headquarters PerkinElmer Optoelectronics Wenzel-Jaksch-Str. 31 65199 Wiesbaden, Germany Telephone: (+49) 611-492-534 Fax: (+49) 611-492-170 Email: opto.Europe@perkinelmer.com
Asia Headquarters PerkinElmer Optoelectronics 47 Ayer Rajah Crescent #06-12 Singapore 139947 Telephone: (+65) 6775-2022 (+65) 67704-366 Fax: (+65) 6775-1008 Email: opto.Asia@perkinelmer.com
For a complete listing of our global offices, visit www.optoelectronics.perkinelmer.com (c)2005 PerkinElmer, Inc. All rights reserved. The PerkinElmer logo and design are registered trademarks of PerkinElmer, Inc. Resistron(R) is a trademark of PerkinElmer, Inc. or its subsidiaries, in the United States and other countries. All other trademarks not owned by PerkinElmer, Inc. or its subsidiaries that are depicted herein are the property of their respective owners. PerkinElmer reserves the right to change this document at any time without notice and disclaims liability for editorial, pictorial or typographical errors. 600099_01 DTS1105
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