Optical laminated structure, head-up display system using the same, and light reflection film
A technology of structures and laminates, applied in optics, optical components, chemical instruments and methods, etc., can solve the problems that the degree of polarization conversion performance of light control film has not been mentioned, and achieve the effect of excellent polarization conversion performance
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Embodiment 1
[0186]
[0187] Using the prepared coating liquids (R1), (R2), (R3) and (R4), the light reflective layers PRL-1, the light reflective layers PRL-2, the light reflective layers PRL-3, The light reflection layer PRL-4 was then laminated to produce a light reflection layer. Next, a quarter-wavelength plate was further laminated on both surfaces of the laminated light reflection layer to produce a light control laminated body. As the plastic substrate, a PET film (trade name A4100, thickness 50Bm, manufactured by Toyobo Co., Ltd., which was previously subjected to a rubbing treatment on the surface without a primer layer by the method described in JP-A-2002-90743A) was used. ).
[0188] (1) Using a wire-wound bar at room temperature, the coating materials shown in Tables 1 and 2 were applied to the rubbed-treated surface of each PET film so that the thickness of each light-reflecting layer obtained after drying was 0.5 Bm, respectively. Each coating liquid of cloth liquid (R1)...
Embodiment 2
[0217] The thickness of each of the light reflection layers PRL-1 to PRL-4 was increased to 1 Bm, and the angle formed by the slow axis of the first quarter-wave plate and the polarization axis of the incident P-polarized light was 15 °, 20°, 25°, 30°, 35°, 40°, 45°, 50°, except that eight pieces of functional glass were produced, and the same method as in Example 1 was performed. The retardation value when the light reflection layer included in the obtained functional glass was tilted by 50° was measured with an automatic birefringent meter (“KOBRA-21ADH” manufactured by Oji Keiki Co., Ltd.), and as a result, the retardation value at 546 nm was 70 nm. . The crossed Nicols evaluation was performed in the same manner as in Example 1, and Table 6 shows the results.
[0218] [Table 6]
[0219] Table 6: Cross Nicols Evaluation Results
[0220]
Embodiment 3
[0222] The thickness of each of the light reflection layers PRL-1 to PRL-4 is increased to 1.5 Bm, and the angle formed by the slow axis of the first quarter-wave plate and the polarization axis of the incident P-polarized light becomes The same method as in Example 1 was performed except that seven pieces of functional glass were produced in the manner of 10°, 15°, 20°, 25°, 30°, 35°, and 40°. The retardation value when the light reflection layer included in the obtained functional glass was tilted by 50° was measured with an automatic birefringent meter (“KOBRA-21ADH” manufactured by Oji Keiki Co., Ltd.), and the retardation value at 546 nm was 90nm. The crossed Nicols evaluation was performed in the same manner as in Example 1, and Table 7 shows the results.
[0223] [Table 7]
[0224] Table 7: Cross Nicols Evaluation Results
[0225]
[0226] The value of θ calculated when the incident angle of the P-polarized light with respect to the functional glass serving as t...
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