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Patent RU 2677069 "METHOD OF ANGULAR REGULATION OF THE DIRECTED LIGHTNING OF THE WINDOWS" issued in 2019 is applicable in architecture and construction for angular regulating the directional light transmission of a window without Venetian blinds or other devices.
Smart window optimizes angular selective filtering of direct solar radiation by minimization of light transmission at preset date and time of day taking into account the azimuth of orientation of the window, the geographical coordinates of building, the seasonal and daily distribution of solar radiation intensity. Optimization is carried out due to using an optical filter with two thin-film surface gratings with alternating transmissive and non-transmissive (preferably made from chromogenic materials) parallel strips. Optimal slope angle of strips to horizontal, widths of strips, shift of input and output gratings relative to each other, angular characteristics of light transmittance can be calculated.
Optimal slope angle of strips is determined by a linear approximation of the trajectory of the sun relative to the window or drawing a tangent to it at a point corresponding to the time of the maximum intensity of solar radiation. To build the trajectory, the heights of standing and azimuths of the sun on the selected day of the year and the incidence angles of the solar beams are calculated.
Optimal slope angle determined by this method can be used also for creating the blinds with sloped lamellas and Zebra blinds with sloped strips to adapt daylight and solar energy control indoors to the trajectory of the sun.
Design of the grating optical filter, a method for calculation of its parameters, experimental results are in:
1) Zakirullin R.S. An optical filter with angular selectivity of the transmittance // Journal of Optical Technology. 2013. Vol. 80, No. 8. P. 480–485.
2) Zakirullin R.S. Creating optical filters with angular-selective light transmission // Appl. Opt. 2015. Vol. 54. No. 21. P. 6416–6419.
3) Zakirullin R.S., Letuta S.N. A smart window for angular selective filtering solar radiation // Solar Energy. 2015. Vol. 120. P. 585–592.
4) Zakirullin R.S. Optimized angular selective filtering of direct solar radiation // J. Opt. Soc. Am. A. 2018. Vol. 35. No. 9. P. 1592–1598.
Sincerely, Rustam Zakirullin, Doctor of Science in Optics, Professor.

Financial information

Preferably, I am looking for outright sale my Patent RU 2677069.
This invention has not been previously sold or marketed.
The market potential depends on the number of consumers who want to control the light transmission of a window at motion of the sun relative to it without using the Venetian blinds or other devices for redistribution of sunlight, as well as creating the blinds with sloped lamellas and Zebra blinds with sloped strips.
I have Patent RU 2509324 based on Application PCT/RU2010/000234 (publ. 19.05.11, WO 2011/059360) associated with this invention.
I prefer to sell my Patents RU 2677069 and RU 2509324 in complect (the total asking price for both patents is indicated).

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