Eyewear display measurement and evaluation is based on the light rays directed from the display to the viewer and the entrance pupil of the measuring equipment. The evaluation results show that the pupil size should be smaller than the width of the light rays, found to be effective for correct evaluation and measurement of significant characteristics, such as luminance and its uniformity, in an eyewear display.
To measure both eye-box/FOV characteristics of a virtual-image eyewear display, a new concept attachment, whose conjugate focal plane is set to an exit pupil of the eyewear display, has been developed. Two-dimensional luminance distributions on the plane perpendicular to the optical axis can be obtained, and which derive eye-box/FOV characteristics.
Speckle in laser display contains several types of interference wavefront which is originated in different generation mechanism. We found out that subjective speckle can be classified into three types; projected speckle, screen speckle and direct speckle. Some experimental results were shown to see how each type of speckle looks like.
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