A comparative analysis is presented of a smart window with grating filter and a conventional smart window fully covered with switchable layer using the same chromogenic material in its colored and bleached states. The filter, formed by two thin-film gratings with alternating transmissive and chromogenic strips, has an angular-selective transmission of direct sunlight. Both gratings are sloped on the window plane at an angle to the horizontal, calculated taking into account the window azimuth to adapt to the solar trajectory relative to this window. The previously obtained calculation methods are modified and expanded, on the basis of which the temporal characteristics of light and solar transmittance, as well as direct and diffuse illuminance and irradiance indoors, of windows with two different southeast azimuths for June 15, September and December are calculated. The results show two main advantages of a grating smart window over a conventional one. Firstly, in active (colored) mode, due to angular selectivity of transmission it has self-adjusting light and solar transmittance throughout the day and year without using the daylight shading/redirecting devices, and in the bleached state, it has a higher transmittance. Secondly, by adjusting the transmission of direct sunlight, the filter transmits more than twice as much diffuse light in both colored and bleached states, thereby increasing indoor comfort in any season.

对带有光栅滤光片的智能窗和完全覆盖有可切换层的传统智能窗进行了比较分析，该智能窗使用相同的显色材料在其着色和漂白状态下进行。该滤光片由两个具有交替透射和显色条带的薄膜光栅组成，具有直射阳光的角度选择性透射。两个光栅在窗口平面上与水平面成一定角度倾斜，计算时考虑了窗口方位角以适应相对于该窗口的太阳轨迹。在此基础上对先前得到的计算方法进行修改和扩展，在此基础上对 6 月 15 日具有两种不同东南方位的窗户的光和太阳透射率以及室内直接和漫射照度和辐照度的时间特性进行了修改和扩展，计算 9 月和 12 月。结果显示了光栅智能窗口相对于传统窗口的两个主要优势。首先，在主动（有色）模式下，由于透射的角度选择性，它在不使用日光遮蔽/重定向装置的情况下，具有全天和全年的自调节光和太阳透射率，在漂白状态下，它具有更高的透射率。其次，通过调整直射阳光的透射率，滤光片在有色和漂白状态下透射的漫射光都增加了两倍以上，从而在任何季节都增加了室内舒适度。由于透射的角度选择性，它在不使用日光遮蔽/重定向装置的情况下，具有全天和全年的自调节光和太阳透射率，并且在漂白状态下具有更高的透射率。其次，通过调整直射阳光的透射率，滤光片在有色和漂白状态下透射的漫射光都增加了两倍以上，从而在任何季节都增加了室内舒适度。由于透射的角度选择性，它在不使用日光遮蔽/重定向装置的情况下，具有全天和全年的自调节光和太阳透射率，并且在漂白状态下具有更高的透射率。其次，通过调整直射阳光的透射率，滤光片在有色和漂白状态下透射的漫射光都增加了两倍以上，从而在任何季节都增加了室内舒适度。