CVSS Camera Technology & Optics Flashcards
6 cards from real CVSS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CVSS Camera Technology & Optics flashcards as text
Which camera sensor type is generally preferred for low-light video surveillance applications?
Answer: CCD (Charge-Coupled Device)
CCD sensors typically produce lower noise and better image quality in low-light conditions compared to standard CMOS sensors.
What does the term 'depth of field' refer to in surveillance camera optics?
Answer: The range of distances within which objects appear acceptably sharp
Depth of field is the zone of acceptable sharpness extending in front of and behind the plane of focus.
A varifocal lens on a surveillance camera allows an installer to:
Answer: Manually adjust the focal length to change the field of view
A varifocal lens lets the installer manually set the focal length within a range, allowing field-of-view adjustment during installation.
What is the primary advantage of a wide dynamic range (WDR) camera in a surveillance system?
Answer: Ability to capture detail in both bright and dark areas simultaneously
WDR technology allows a camera to balance exposure so that detail is visible in both bright highlights and dark shadows within the same frame.
When selecting a camera lens for license plate capture on a highway lane, which characteristic is most critical?
Answer: Long focal length for narrow field of view and subject magnification
A long focal length (telephoto) lens narrows the field of view and magnifies distant subjects, which is essential for capturing legible license plates from a distance.
Which IP camera rating indicates the enclosure is dust-tight and protected against powerful water jets from any direction?
Answer: IP66
IP66 means complete dust protection (6) and protection against powerful water jets from any direction (6).