1.2. Radiation laws, image formation Flashcards
1
Q
What are the 2 conditions for geometric optics?
A
- light propagates through a slit much larger than its wavelength, thus the wavefront can be simplified as a simple line
- Medium in which light rays travel is homogenous in composition
2
Q
What is a light ray?
A
extremely thin parallel light beams
3
Q
What is the index of refraction?
A
n = c/v
c : speed of light in vacuum
v : speed of light in medium
4
Q
What is the outer coating of endoscope made of?
A
plastic, metal
5
Q
What is the inner coating of endoscope?
A
optical fibers
6
Q
For internal reflection to happen in endoscopy, at which minimum angle should the light rays hit the wall of the fiber?
A
82°
7
Q
What is the angular magnification if image is at the close focus point
A
N = a/f + 1
a : image distance
f : focal distance
8
Q
What is the angular magnification if image is at the infinite distance
A
N = a/f
