Lighting

Question 1

What are the 4 contrast enhancement concepts?

Answer 1

Geometry (direction and source)
Structure (pattern)
Color
Filtering

Question 2

What are the characteristics of vision lighting?

Answer 2

Measured “Intensity” (Power): Radiometric and Photometric
Frequency: Varies with wavelength
Wavelength: Expresses in nanometers

Question 2

What is Reflection?

Answer 2

Light must interact (mostly reflect) with objects for us to see it
Specular Reflection - Back into the camera
Diffuse Reflection - Away from the camera

Question 2

What is Diffusion?

Answer 2

Spreading or dispersal of light into the object

Question 3

What are the 4 most common light sources?

Answer 3

LED
Quartz Halogen
Fluorescent
Xenon Strobe - Non constant

Question 4

What is L70 measure?

Answer 4

64000 hr means after 64K hours of operation, 70% of the light power remains.

Question 5

What is the Photobiological Safety standard?

Answer 5

IEC 62471. Id light hazards specific to UV/blue, visible, and Thermal/IR Wavelength.

Question 6

What does Radiometric measure?

Answer 6

Measurement units of optical radiation over the ENTIRE ELECTROMAGNETIC SPECTRUM.

Question 7

What does Photometric measure?

Answer 7

Those radiometric measures limited to the visible spectrum and scaled to the human eye response.