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DLP6500FYE: 激光照到DMD上的问题

Part Number: DLP6500FYE


通过dmd显示一个圆环,把激光照到圆环上,圆环越细,看反射的圆环图案就比较模糊,圆环就变粗了,这是什么原因引起的

例如图片上的圆环宽度是15个微镜,后边黄色的图是通过护目镜拍的,这个是因为dmd衍射引起的吗?有解决办法吗?激光的发散角很小,带宽也很小。