Two-dimensional optical image edge enhancement is investigated using a spatial acousto-optical (AO) filter operating at two wavelengths of optical radiation, which significantly increases the reliability of measurements and also reduces the effect of noise. The filter operates basing on diffraction of light in two diffraction orders. It is shown that, in the general case, it is impossible to obtain a two-dimensional image contour simultaneously at two wavelengths at the same energy and frequency-angular parameters of the AO filter. A regime has been found that makes it possible to switch from one wavelength to another while maintaining the operation of edge enhancement by changing the acoustic power. This regime has been experimentally confirmed by the example of the formation of a two-dimensional image contour using two-colour radiation of an Ar laser emitting at wavelengths of 0.488 10⁻⁴ and 0.514 10⁻⁴ cm, and an AO cell made of TeO₂, operating at a sound frequency of 57 MHz.

使用在两个光辐射波长下工作的空间声光 (AO) 滤波器研究二维光学图像边缘增强，这显着提高了测量的可靠性并降低了噪声的影响。滤光片基于两个衍射级的光衍射进行操作。结果表明，在一般情况下，不可能在 AO 滤波器的相同能量和频率-角度参数下同时获得两个波长处的二维图像轮廓。已经发现了一种方案，它可以从一个波长切换到另一个波长，同时通过改变声功率来保持边缘增强的操作。^-4和 0.514 10 ^-4 cm，以及由 TeO ₂制成的 AO 电池，以 57 MHz 的声音频率工作。