素面彩虹全息材料的光栅常数测量方法比较

Comparison of Grating Constant Measurement Methods for Plain Rainbow Holographic Materials

为了方便、快捷地进行素面彩虹全息材料的光栅常数测量,选用颜色测量领域常用的分光光度计(环形光照明)和扫描设备,在0°~90°范围内,固定测量点,旋转彩虹全息材料,进行不同素面彩虹全息材料的光谱能量信息和图像信息采集。研究发现随着旋转角度的变化,在0°~45°和45°~90°两个范围内采集到素面彩虹全息材料的光谱能量和图像颜色信息呈周期对称变化。由光栅方程的计算得出,在素面彩虹全息材料其正方形栅格的边长和对角线方向具有两个不同的有效光栅常数。研究结果与高倍数显微设备测量结果具有较好的一致性。测量结果可为检验光柱和素面彩虹全息材料的微观结构提供一种理论计算依据。

In order to measure the grating constants of the plain rainbow holographic materials quickly and conveniently, the spectrophotometers(loop light illumination) and scanning equipments commonly used in color measurement fields are used to collect the spectral energy and image information of different plain rainbow holographic materials by fixing the measuring point and rotating the plain rainbow holographic materials in the range of 0°-90°. It is found that with the change of rotation angle, the spectral energy and image color information of the plain rainbow holographic materials collected in the range of 0°-45° and 45°-90° show a periodic and symmetrical change. From the grating equation, it is found that there are two effective grating constants in the side length and diagonal directions of the holographic master materials. The experimental results are in good consistency with those obtained by high amplification ratio microscopes. The measured results can provide a theoretical basis for the examination of the microstructures of light pillar holographic materials and plain rainbow holographic materials.