MTF of Proximity-Focused Image Tube in Polychromatic Light

O. P. Nijhawan; P. K. Datta; C. R. Sharma

doi:10.1364/AO.14.000509

Applied Optics
Vol. 14,
Issue 2,
pp. 509-512
(1975)
•https://doi.org/10.1364/AO.14.000509

MTF of Proximity-Focused Image Tube in Polychromatic Light

O. P. Nijhawan, P. K. Datta, and C. R. Sharma

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O. P. Nijhawan, P. K. Datta, and C. R. Sharma, "MTF of Proximity-Focused Image Tube in Polychromatic Light," Appl. Opt. 14, 509-512 (1975)

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Abstract

The effect of different conditions of illumination and the spectral sensitivity of the detector on the performance of proximity-focused image tube has been evaluated in terms of the polychromatic modulation transfer function. The physical efficiencies of sources commonly used in the infrared image conversion system have been compared for a Corning glass 2540 glass filter and a GaAs filter having antireflection coatings on both sides.

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λ (mμ)	P(λ)dλ (w/cm²) dλ = 20 mμ	F(λ) Corning glass 2540	F(λ) GaAs	S(λ)	P(λ)F(λ)S(λ)dλ with Corning glass filter	P(λ)F(λ)S(λ)dλ With GaAs filter
800	1.728	0.005	0	1.000	8.640 × 10⁻³	0
820	1.766	0.010	0	0.990	1.748 × 10⁻²	0
840	1.798	0.030	0	0.970	5.232 × 10⁻²	0
860	1.827	0.055	0	0.940	9.445 × 10⁻²	0
880	1.853	0.090	0	0.875	1.459 × 10⁻¹	0
900	1.872	0.130	0.9	0.825	2.008 × 10⁻¹	1.390
920	1.876	0.190	0.9	0.735	2.620 × 10⁻¹	1.241
940	1.886	0.250	0.9	0.620	2.923 × 10⁻¹	1.052
960	1.895	0.300	0.9	0.510	2.899 × 10⁻¹	8.698 × 10⁻¹
980	1.888	0.380	0.9	0.390	2.798 × 10⁻¹	6.627 × 10⁻¹
1000	1.878	0.450	0.9	0.300	2.535 × 10⁻¹	5.071 × 10⁻¹
1020	1.874	0.515	0.9	0.220	2.123 × 10⁻¹	3.711 × 10⁻¹
1040	1.863	0.570	0.9	0.160	1.699 × 10⁻¹	2.683 × 10⁻¹
1060	1.838	0.620	0.9	0.120	1.367 × 10⁻¹	1.985 × 10⁻¹
1080	1.814	0.660	0.9	0.085	1.018 × 10⁻¹	1.388 × 10⁻¹
1100	1.783	0.690	0.9	0.055	6.767 × 10⁻²	8.826 × 10⁻²
1120	1.759	0.720	0.9	0.035	4.433 × 10⁻²	5.541 × 10⁻²
1140	1.732	0.745	0.9	0.020	2.581 × 10⁻²	3.117 × 10⁻²
					PE 2.6556 Units	PE 6.874 Units

λ (mμ)	P(λ)dλ (w/cm²) dλ = 20 mμ	F(λ) Corning glass 2540	F(λ) GaAs	S(λ)	P(λ)F(λ)S(λ)dλ with Corning glass filter	P(λ)F(λ)S(λ)dλ With Ga as filter
800	6.048	0.005	0	1.000	3.024 × 10⁻²	0
820	13.912	0.010	0	0.990	1.377 × 10⁻¹	0
840	9.552	0.030	0	0.970	2.780 × 10⁻¹	0
860	5.568	0.055	0	0.940	2.879 × 10⁻¹	0
880	8.496	0.090	0	0.875	6.690 × 10⁻¹	0
900	21.600	0.130	0.9	0.825	2.317	16.038
920	14.688	0.190	0.9	0.735	2.051	9.716
940	16.320	0.250	0.9	0.620	2.530	9.107
960	17.520	0.300	0.9	0.510	2.681	8.042
980	15.360	0.380	0.9	0.390	2.276	5.391
1000	24.912	0.450	0.9	0.300	3.363	6.726
1020	8.352	0.515	0.9	0.220	9.463 × 10⁻¹.	1.654
1040	8.544	0.570	0.9	0.160	7.792 × 10⁻¹	1.230
1060	8.784	0.620	0.9	0.120	6.535 × 10⁻¹	0.949
1080	9.120	0.660	0.9	0.085	5.116 × 10⁻¹	0.698
1100	9.840	0.690	0.9	0.055	3.734 × 10⁻¹	0.487
1120	9.312	0.720	0.9	0.035	2.347 × 10⁻¹	0.293
1140	8.064	0.745	0.9	0.020	1.201 × 10⁻¹	0.145
					PE 20.240 Units	PE 60.476 Units

λ (mμ)	P(λ)dλ (w/cm²) dλ = 20 mμ	F(λ) Corning glass 2540	F(λ) GaAs	S(λ)	P(λ)F(λ)S(λ)dλ with Corning glass filter	P(λ)F(λ)S(λ)dλ With GaAs filter
800	1.728	0.005	0	1.000	8.640 × 10⁻³	0
820	1.766	0.010	0	0.990	1.748 × 10⁻²	0
840	1.798	0.030	0	0.970	5.232 × 10⁻²	0
860	1.827	0.055	0	0.940	9.445 × 10⁻²	0
880	1.853	0.090	0	0.875	1.459 × 10⁻¹	0
900	1.872	0.130	0.9	0.825	2.008 × 10⁻¹	1.390
920	1.876	0.190	0.9	0.735	2.620 × 10⁻¹	1.241
940	1.886	0.250	0.9	0.620	2.923 × 10⁻¹	1.052
960	1.895	0.300	0.9	0.510	2.899 × 10⁻¹	8.698 × 10⁻¹
980	1.888	0.380	0.9	0.390	2.798 × 10⁻¹	6.627 × 10⁻¹
1000	1.878	0.450	0.9	0.300	2.535 × 10⁻¹	5.071 × 10⁻¹
1020	1.874	0.515	0.9	0.220	2.123 × 10⁻¹	3.711 × 10⁻¹
1040	1.863	0.570	0.9	0.160	1.699 × 10⁻¹	2.683 × 10⁻¹
1060	1.838	0.620	0.9	0.120	1.367 × 10⁻¹	1.985 × 10⁻¹
1080	1.814	0.660	0.9	0.085	1.018 × 10⁻¹	1.388 × 10⁻¹
1100	1.783	0.690	0.9	0.055	6.767 × 10⁻²	8.826 × 10⁻²
1120	1.759	0.720	0.9	0.035	4.433 × 10⁻²	5.541 × 10⁻²
1140	1.732	0.745	0.9	0.020	2.581 × 10⁻²	3.117 × 10⁻²
					PE 2.6556 Units	PE 6.874 Units

λ (mμ)	P(λ)dλ (w/cm²) dλ = 20 mμ	F(λ) Corning glass 2540	F(λ) GaAs	S(λ)	P(λ)F(λ)S(λ)dλ with Corning glass filter	P(λ)F(λ)S(λ)dλ With Ga as filter
800	6.048	0.005	0	1.000	3.024 × 10⁻²	0
820	13.912	0.010	0	0.990	1.377 × 10⁻¹	0
840	9.552	0.030	0	0.970	2.780 × 10⁻¹	0
860	5.568	0.055	0	0.940	2.879 × 10⁻¹	0
880	8.496	0.090	0	0.875	6.690 × 10⁻¹	0
900	21.600	0.130	0.9	0.825	2.317	16.038
920	14.688	0.190	0.9	0.735	2.051	9.716
940	16.320	0.250	0.9	0.620	2.530	9.107
960	17.520	0.300	0.9	0.510	2.681	8.042
980	15.360	0.380	0.9	0.390	2.276	5.391
1000	24.912	0.450	0.9	0.300	3.363	6.726
1020	8.352	0.515	0.9	0.220	9.463 × 10⁻¹.	1.654
1040	8.544	0.570	0.9	0.160	7.792 × 10⁻¹	1.230
1060	8.784	0.620	0.9	0.120	6.535 × 10⁻¹	0.949
1080	9.120	0.660	0.9	0.085	5.116 × 10⁻¹	0.698
1100	9.840	0.690	0.9	0.055	3.734 × 10⁻¹	0.487
1120	9.312	0.720	0.9	0.035	2.347 × 10⁻¹	0.293
1140	8.064	0.745	0.9	0.020	1.201 × 10⁻¹	0.145
					PE 20.240 Units	PE 60.476 Units

Abstract

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Figures (2)

Tables (2)

Equations (9)

Applied Optics