Table I
Logarithms of luminous flux, ∫RλtλKλdλ to elicit electrical responses of 58 microvolts in the dark-adapted retina. Test flashes of 0.04-sec. duration, central fixation on a circular field, 7°30′ in diameter. Contact lens electrode over cornea, neutral electrode over supra-orbital ridge. Experiments of July, 1948 and December, 1948 (the latter data are marked with asterisks).
Selective filter | M | K | 76 | I | H | G | F | E | C |
---|
Dominant wave-length (mμ) | 424 | 434 | 446 | 466 | 509 | 529 | 541 | 564 | 625 |
LSH | log luminous flux | 1.30* | 1.50 | 1.51 | 1.85 | 1.92 | 2.02 | 2.04 | 2.12 | 2.14 |
| departure | −0.62 | −0.42 | −0.41 | −0.07 | 0.00 | 0.10 | 0.12 | 0.20 | 0.22 |
LML | log luminous flux | 1.10* | 1.14 | 1.12 | 1.35 | 1.53 | 1.62 | 1.93 | 2.12 | 2.03 |
| departure | −0.77 | −0.39 | −0.41 | −0.18 | 0.00 | 0.09 | 0.40 | 0.59 | 0.50 |
FR | log luminous flux | 0.84* | 1.00 | 1.15* | 1.35 | 1.53 | 1.37 | 1.58 | 1.87 | 1.82 |
| departure | −0.69 | −0.58 | −0.38 | −0.18 | 0.00 | −0.16 | 0.05 | 0.34 | 0.29 |
LAR | log luminous flux | | 1.20 | 1.17 | 1.58 | 1.73 | 1.83 | 1.73 | 2.14 | 2.43 |
| departure | | −0.53 | −0.56 | −0.15 | 0.00 | 0.10 | 0.00 | 0.41 | 0.70 |
MJW | log luminous flux | | 1.35 | | 1.35 | 1.79 | 1.96 | 1.81 | 2.30 | 2.32 |
| departure | | −0.44 | | −0.44 | 0.00 | 0.17 | 0.02 | 0.51 | 0.53 |
Mean departures (from the Stiles and Smith scotopic curve relative to the value at 509 mμ). | −0.69 | −0.46 | −0.44 | −0.20 | 0.00 | 0.06 | 0.12 | 0.41 | 0.45 |
Table II
Logarithms of luminous flux, ∫RλtλKλdλ to elicit electrical responses of 58 microvolts in the light-adapted retina. Conditions as in Table I above except that each test flash was delivered 60 seconds after a two-minute exposure to a large adapting field of white light having a brightness of 202 footlamberts. Experiments of August, 1948.
Selective filter | K | 76 | I | H | G | F | E | C |
---|
Dominant wave-length (mμ) | 434 | 446 | 466 | 509 | 529 | 541 | 564 | 625 |
RNB | log luminous flux | 2.74 | 2.66 | 2.86 | 3.14 | 3.35 | 3.38 | 3.30 | 3.00 |
| departure | −0.40 | −0.48 | −0.28 | 0.00 | 0.21 | 0.24 | 0.16 | −0.14 |
LSH | log luminous flux | 3.10 | 3.31 | 3.02 | 3.30 | 3.40 | 3.52 | 3.76 | 3.15 |
| departure | −0.20 | 0.01 | −0.28 | 0.00 | 0.10 | 0.22 | 0.46 | −0.15 |
LML | log luminous flux | 2.21 | 2.25 | 2.55 | 2.74 | 3.10 | 3.01 | 3.51 | 2.59 |
| departure | −0.53 | −0.49 | −0.19 | 0.00 | 0.36 | 0.27 | 0.77 | −0.15 |
FR | log luminous flux | 2.64 | 2.44 | 3.13 | 3.04 | 3.25 | 3.22 | 3.47 | 2.77 |
| departure | −0.40 | −0.60 | 0.08 | 0.00 | 0.21 | 0.18 | 0.43 | −0.27 |
LAR | log luminous flux | 3.66 | | 3.55 | 3.75 | 3.90 | 3.72 | 4.08 | 3.45 |
| departure | −0.09 | | −0.20 | 0.00 | 0.15 | −0.03 | 0.33 | −0.30 |
Mean departures (from the Stiles and Smith scotopic curve relative to the value of 509 mμ) | −0.32 | −0.39 | −0.17 | 0.00 | 0.21 | 0.18 | 0.43 | −0.20 |
Table III
Logarithms of luminous flux, ∫RλtλKλdλ, delivered to the eye by the arrangement shown in Fig. 11. Scotopic matching by five observers of a stimulus patch having a brightness of 22 microfootlamberts. Experiments of July and August, 1948. Dark-adapted eye, central fixation on circular bipartite field 8° in diameter. Values of Kλ from Stiles and Smith mean scotopic data.
Selective filter | K | 76 | I | H | G | F | E | C | B |
---|
Dominant wave-length (mμ) (see Fig. 2) | 434 | 446 | 466 | 509 | 529 | 541 | 564 | 625 | 643 |
RNB | log luminous flux |
|
|
|
|
|
|
|
|
|
| departure | −0.31 | −0.24 | −0.01 | 0.00 | 0.08 | 0.19 | −0.03 | 0.10 | 0.21 |
LSH | log luminous flux |
|
|
|
|
|
|
|
|
|
| departure | −0.18 | −0.10 | −0.05 | 0.00 | 0.17 | 0.12 | 0.16 | 0.12 | 0.32 |
LML | log luminous flux |
|
|
|
|
|
|
|
|
|
| departure | −0.33 | −0.32 | −0.17 | 0.00 | −0.08 | −0.12 | −0.04 | −0.06 | 0.05 |
FR | log luminous flux |
|
|
|
|
|
|
|
|
|
| departure | −0.22 | −0.15 | −0.15 | 0.00 | 0.03 | −0.11 | 0.01 | 0.06 | 0.03 |
LAR | log luminous flux |
|
|
|
|
|
|
|
|
|
| departure | −0.16 | −0.11 | −0.13 | 0.00 | 0.04 | −0.07 | 0.08 | 0.15 | 0.13 |
Mean departures (from the Stiles and Smith scotopic curve relative to the value at 509 mμ) | −0.24 | −0.18 | −0.10 | 0.00 | 0.05 | 0.00 | 0.04 | 0.07 | 0.15 |
Table IV
Logarithms of luminous flux, ∫Rλtλkλdλ for photopic matching of a stimulus patch having a brightness of 227 footlamberts. Light-adapted eye, method of flicker photometry with central fixation on a circular flickering field 1°50′ in diameter surrounded by a large adapting field of white light having a brightness of 227 footlamberts. Experiments of August, 1948. Values of kλ from I.C.I. photopic luminosity data.
Selective filter | 76 | H | G | F | E | C | B |
---|
Dominant wave-length (mμ) (see Fig. 3) | 447 | 513 | 531. | 542 | 568 | 628 | 645 |
RNB | log luminous flux | 1.68 | 1.89 | 1.89 | 1.71 | 1.68 | 1.66 | 1.86 |
| departure | −0.03 | 0.18 | 0.18 | 0.00 | −0.03 | −0.05 | 0.15 |
LSH | log luminous flux | 1.50 | 1.88 | 2.01 | 1.82 | 1.85 | 1.76 | 1.75 |
| departure | −0.32 | 0.06 | 0.19 | 0.00 | 0.03 | −0.06 | −0.07 |
LML | log luminous flux | 1.74 | 1.96 | 1.99 | 1.71 | 1.76 | 1.59 | 1.80 |
| departure | 0.03 | 0.25 | 0.28 | 0.00 | 0.05 | −0.12 | 0.09 |
FR | log luminous flux | 1.85 | 1.90 | 1.85 | 1.78 | 1.78 | 1.73 | 1.84 |
| departure | 0.07 | 0.12 | 0.07 | 0.00 | 0.00 | −0.05 | 0.06 |
LAR | log luminous flux | 1.39 | 1.89 | 1.94 | 1.76 | 1.83 | 1.87 | 1.87 |
| departure | −0.37 | 0.13 | 0.18 | 0.00 | 0.07 | 0.11 | 0.11 |
Mean departure (from I.C.I. photopic curve, relative to the value of 542 mμ). | −0.12 | 0.15 | 0.18 | 0.00 | 0.02 | −0.03 | 0.07 |