Optical attenuators with Risley prisms and disk choppers

Proceedings of the Romanian Academy Series A-Mathematics Physics Technical Sciences Information Science

Virgil-Florin DUMA¹ 

关键词: optical attenuators;    transmission coefficient;    filters;    shutters;    Risley prisms;    translational;    optical wedges;    neutral density filters;    optomechanics;    disk choppers.;   

DOI  :  

学科分类：计算机科学（综合）

来源: Editura Academiei Romane

【 摘 要 】

We approach different types of optomechanical attenuators with shutters and filters.Common devices are reviewed, and their advantages and drawbacks are discussed from the point ofview of a set of characteristic parameters – in contrast to other devices that we have developed and/oroptimized. Polarizing and step-by-step filters are thus compared with the translational Risley prismsthat we have developed; the optimal solution of the latter is presented. Commercially availableshutters are pointed out, while choppers with disks are approached in detail for optical attenuation.For the latter, classical disks with windows with linear margins are considered, and their transmissioncoefficient is determined for finite diameter sections of top-hat laser beams in the plane of the disk.The case of beam sections with diameters smaller that the width of the chopper window is considered,as well as the case of beam sections that overlap the outer and/or inner window margins. The lattercase is proposed as a solution to adjust the average transmission coefficient of the device.

【 授权许可】

Unknown