Pupils And Stops And Related Effects 2

Question 1

Field lens

Answer 1

• A plus thin lens that is added to a system to eliminate vignetting
• it increases with field of uniform illumination and the field of half illumination
• images the second lens at the same location as the first lens. It is places at the internal real image position

Please for the love of god do some practice problems

Question 2

Pupil matching

Answer 2

-maximizes the light getting through multiple optical systems by placing the entrance pupil of a second optical system with the exit pupil of the first pupil

Please for the love of god do some practice problems

Question 3

Virtual reality field of view

Answer 3

80 degrees

Please for the love of god do some practice problems

Question 4

Virtual reality eye relief

Answer 4

18mm

Please for the love of god do some practice problems

Question 5

Virtual reality lens diameter

Answer 5

34mm

Please for the love of god do some practice problems

Question 6

Virtual reality lens focal distance

Answer 6

37.3mm

Please for the love of god do some practice problems

Question 7

Virtual reality PD

Answer 7

64mm

Please for the love of god do some practice problems

Question 8

Keplarian telescope lenses

Answer 8

Objective lens +

Ocular lens +

Question 9

Keplarian telescope image

Answer 9

Magnified and inverted

Focal point of objective lens is ON the focal point of eye piece

Question 10

Ramsden circle

Answer 10

• exit pupil of kep telescope
• image of the objective lens by the ocular lens
• real image
• important designs of the kep telescope

Question 11

How do you calculate exit pupil (Ramsden) from magnification and diameter?

Answer 11

Objective lens diameter/magnification

8 times mag
40 mm diameter
8X40

40/8=5mm

Question 12

Larger objective…

Answer 12

Provides greater light and better resolution

Question 13

Galilean telescope lenses

Answer 13

Objective +

Ocular lens -

Question 14

What is the field of view limited by in the galilean telescope?

Answer 14

The objective lens

Question 15

WHat is the field of view maximized by in the Galilean telescope?

Answer 15

Getting as close as possible to the ocular lens

Question 16

Exit pupil of galilean telescope

Answer 16

Virtual image (inside the telescope)

Question 17

Pupil matching in galilean telescope

Answer 17

Cannot get pupil matching

Question 18

Stimulus variables affecting pupil size

Answer 18

• light level
• spectral composition
• spatial configurations (field size)
• monocular/binocular view
• accommodative state
• non-visual stimuli (pain, noise)

Question 19

Observer variables affecting pupil size

Answer 19

• individual differences
• age
• day-to-day within observer variance
• biomechanical factors (respiration and heart beat)
• cognitive factors (arousal/attention/fright, workload, hedonistic content)

Question 20

What is the pupil perfectly located for?

Answer 20

To maximize the field of view of the eye

Question 21

1/2 illumination field of view

Answer 21

Angle sub tended from the center of the entrance pupil to the edges of the field stop

Question 22

How doe eye perceive light?

Answer 22

On a logarithmic scale

Question 23

What is most responsible for how the eye reacts to light?

Answer 23

The retina