METHOD OF DETERMINING MONOCHROMIC SPECTRAL SENSITIVITY OF CONE CELLS AND ROD CELLS OF HUMAN RETINA IN VIVO Russian patent published in 2011 - IPC A61B3/10 

FIELD: physics, optics.

SUBSTANCE: invention relates to contactless measurement of photochromic spectral sensitivity of human eyes in vivo. Human eye retina macular area is sounded by broadband 390-800 nm optical radiation. To selectively define spectral width rod cell sensitivity Δλ, interference fringes with fixed spatial period not exceeding 10 minutes or arc are produced. Intensity of optical radiation is decreased to origination of black-and-white interference fringes. Beam intensity pulse modulation is set with pulse repetition rate of 12-13 Hz and on-off of 2 to determine quantity of pulsating black-and-white interference fringes N and to calculate spectral width of rod cell sensitivity spectral width from relation: Δλ=λ/N, where: λ=510 nm is wavelength corresponding to rod cell maximum sensitivity. To determine spectral width of sensitivity of "red" - Δλ_R, "green" - Δλ_G and "blue" - Δλ_B cells, respectively, modulated is light beam intensity on frequency of 44-46 Hz. Beam intensity is increased to origination of scintillations on frequency of 44-46 Hz of central uncolored fringe. Then, modulation frequency is set to 22-23 Hz to define quantity of pulsating red interference fringes N_R, green interference fringes N_G and blue interference fringes N_B, respectively, to define spectral width of colored cells Δλ_i from relation Δλ_i = λ_i / N_i, where: N_i=N_R, N_G, N_b, and λ_i is wave length corresponding to maximum sensitivity for "red" cone cells λ_R=600 nm, for "green" cone cells λ_G=530 nm and "blue" cone cells λ_B=450 nm.

EFFECT: optimised spectral sensitivity of cone and rod cells to optimise colored optical video systems.

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