All RF Cafe quizzes would make perfect fodder for employment interviews for technicians or engineers
- particularly those who are fresh out of school or are relatively new to the work world. Come to
think of it, they would make equally excellent study material for the same persons who are going to
be interviewed for a job.Some of these books used in quizzes
are available as prizes in the monthly
RF Cafe Giveaway
Note: Many answers contain passages quoted from the text.
quiz is based on the information presented in "Introduction
to Infrared and Electro-Optical Systems," by Ronald G. Driggers and Melvin
What is the term for light distribution on the image plane from a point source?
a) Point spread function
b) Light distribution function
c) Specular distribution function
d) Snell's Law
2. What is the term for when there is a
fixed phase relationship of an EM field between two points in space or two
points in time?
What is the term describing "any deviation of light rays from rectilinear
paths which cannot be interpreted as reflection or refraction?"
4. Which material listed
below has the highest total emissivity (defined as total spectral signature
wrt a blackbody)?
a) Snow & graphite
b) Paper &
c) Polished gold & polished brass
brass & oxidized steel
Match the lens ray tracing diagram with its application type.
Magnifying glass ____
d) Search light ____
6. What is a 'Cold Shield' as used in electro-optical
a) A military acronym for special night combat exercises
b) A cooled aperture adjacent to the detector plane
armor placed around an infrared system
d) The cold calibration standard
used in conjunction with a "hot" standard
What are the two general classes of electro-photonic detectors?
Electronic and photonic
b) Photon (quantum) and thermal
Up and down spin
d) Commercial and military
8. What is a bolometer?
a) A device for
generating a broadband noise spectrum
b) A device for generating
a narrowband noise spectrum
c) A device for measuring the inverse
resistance of light
d) A device which varies its electrical resistance
depending on the total electromagnetic power incident upon it.
9. What is the modern name of the U.S. Army's
former Night Vision Laboratory (NVL)?
a) Post-Day Vision Laboratory
b) Night Vision & Electronic Sensors Directorate (NVESD)
Robert C. Byrd Night Vision Laboratory (RCBNVL)
Night Vision & Electronic Sensors Directorate (NVESD)
effort began approximately 50 years ago at the then U.S. Army Night Vision
Laboratory (NVL). Today NVL is known as the U.S. Army Communications &
Electronics Command (CECOM), but is still referred to as NVL in the community
and that acronym. (see page 373)
What is Persistent Surveillance?
a) The use of wide-area coverage
b) Long-term surveillance
d) Narrowly focused surveillance
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