1. Human Perception
4: Wavelenght Encoding

2. Measuring the Spectral Composition
Newton’s summary drawing
4.2

3. Measuring the Spectral Composition
Basic monochromator
4.3

4. Measuring the Spectral Composition
A spectroradiometer
Lens
Prism
Photodetector
Movable slit
Point source
4.4

5. Measuring the Spectral Composition
Spectral power distribution
(a) blue skylight
(b) a tungsten bulb
4.5

6. Measuring the Spectral Composition
Superposition of light SPD
4.6

7. Scotopic Wavelength Encoding
Rhodopsin
regenerated
4.7

8. Scotopic Wavelength Encoding
Rhodopsin
bleached
4.8

9. Rod Color Matching

10. Example Data: Rod Matches

11. Photopigment Absorptions

12. Rhodopsin Absorption Curve

13. Rhodopsin And Optics Predicts Matches

14. Cone Color Matching Experiment
(b)

15. Metamers

16. More Metamers

17. Color Matching Superposition

18. Standard CMFs (10 deg)

19. Color Matching Equations
Setting
CIE RGB functions

20. Cones and Color Matching (Roorda et al.)
Cone inner segments have a diameter of roughly 1-2 micron in foveola and much larger in the periphery. Here (foveolar edge) they are about 3-4 microns
(330 microns ~ 1 deg)

21. Single Unit Cone Measurements

22. Voltage Recordings From a Cone

23. Cone Wavelength Responsivity

24. Basic Color Equation
Input SPD
Response
Sensor responsivity

25. CMFs and Cone Responsivity