Dimming sheet and preparation method thereof
A dimming sheet and dimming technology, used in optics, optical components, instruments, etc., can solve the problem of controlling high-purity bulk scattered light without emphasizing surface scattering interference, without scattering control, and unaware of high-purity bulk scattering Control method advantages and other issues, to achieve the effect of smooth distribution curve, soft light intensity change, and smooth transition
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Embodiment 1
[0195] Such as Figure 13 As shown, the dimming sheet provided by the present invention includes a dimming layer 1 and a base 0. The dimming layer 1 is placed on one surface of the base 0. The thickness H of the base is 0.05 mm. The base includes a light-incident surface 001 and a light-emitting surface 002. The thickness T of the light-adjusting layer is 50 μm. The light-adjusting layer includes a propagation medium 1A and a light-scattering agent 1B, a light incident surface 101, and a light-emitting surface 102. The light-scattering agent 1B is uniformly dispersed in the propagation medium 1A to form a volume scattering system. Input The light 01 is emitted from the light-emitting surface 00 of the input light source, passes through the light-incident surface 001 and the light-exit surface 002 of the substrate in turn, and then enters from the light-incidence surface 101 of the light-adjusting layer, and is controlled by the volume scattering of the light-adjusting layer. 1...
Embodiment 2
[0197] For the dimming film provided in Example 1, the filling rate D' is 0.2, and the shape of the output light 02 is approximately egg-shaped, such as Figure 11c Shown in curve 083 / triangular as Figure 12c As shown in the middle curve 083, the beam angle Φ 2 =90°.
Embodiment 3-15
[0199] For the dimmer provided in Example 1, the thickness H of the substrate is 0.15 mm, the roughness Ra of the light incident surface 001 and the light exit surface 002 of the substrate is Ra<0.05 μm, the substrate is a glass substrate, and the material 0A is silicate glass , and the other parameters are listed in Table 3.
[0200] In fact, for the same control method of input light and output light, the combination of the propagation medium and the light scattering agent in the dispersion is not limited to the above-mentioned embodiments, and can be made according to the optical properties (refractive coefficient, extinction coefficient) of the propagation medium and the light scattering agent. Various changes, such as corresponding changes in coating thickness, filling rate, particle size distribution, etc. For the same embodiment, the control combination of input light and output light is not limited to the above embodiment, and different control combinations will be obt...
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Abstract
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