Gain: Difference between revisions
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Gain specified in imperial units uses the units of foot-Lamberts by foot-candle (<math display="inline">\mathrm{fL} / \mathrm{fc}</math>). | Gain specified in imperial units uses the units of foot-Lamberts by foot-candle (<math display="inline">\mathrm{fL} / \mathrm{fc}</math>). | ||
To measure gain in accordance to the [[MX-10160#MX-10160/AVS-6|MX-10160/AVS-6]] specification, the photocathode is exposed to <math>2 * 10^{-6} \mathrm{fc}</math>. A photometer is then used to measure the brightness of the phosphor screen (in <math>\mathrm{fL}</math>). The resulting value is divided by <math>2 * 10^{-6}</math> to obtain the gain in <math display="inline">\mathrm{fL} / \mathrm{fc}</math>. | To measure gain in accordance to the [[MX-10160#MX-10160/AVS-6|MX-10160/AVS-6]] specification, the photocathode is exposed to <math>2 * 10^{-6} \mathrm{fc}</math>. A photometer is then used to measure the brightness of the phosphor screen (in <math>\mathrm{fL}</math>). The resulting value is divided by <math>2 * 10^{-6}</math> to obtain the gain in <math display="inline">\mathrm{fL} / \mathrm{fc}</math>.<ref>http://everyspec.com/MIL-SPECS/MIL-SPECS-MIL-I/MIL-I-49428_53852/ (page 8, item 3.6.8)</ref> | ||
To further test auto brightness control, the same procedure | To further test auto brightness control, the same procedure | ||
== References == | |||
<references /> | |||
Revision as of 13:03, 28 March 2023
Gain, also called brightness gain or luminance gain, is the measurement of the increase in brightness between the input and the output of an image intensifier tube.
Specification
There are two different ways of specifying gain.
Imperial
Gain specified in imperial units uses the units of foot-Lamberts by foot-candle ().
To measure gain in accordance to the MX-10160/AVS-6 specification, the photocathode is exposed to . A photometer is then used to measure the brightness of the phosphor screen (in ). The resulting value is divided by to obtain the gain in .[1]
To further test auto brightness control, the same procedure
References
- ↑ http://everyspec.com/MIL-SPECS/MIL-SPECS-MIL-I/MIL-I-49428_53852/ (page 8, item 3.6.8)
