2019亚洲精品男人天堂,狠狠躁夜夜躁人人爽超碰97香蕉,无码丰满熟妇juliaann与黑人,国产成人亚洲综合

Large Beam Collimators  By using an air gap bonded lens, it can provide better beam quality than aspherical lenses and achromatic lenses in terms of collimation performance. The design of a low aberration lens group can achieve a beam closer to a Gaussian beam, with smaller divergence angles and smaller wavefront errors.