Abstract: An optical wavefront testing system includes a light source, an image capturing unit and a processing unit. The image capturing unit includes a lens array and a sensor module that is configured to detect light rays passing through an optical element and the lens array. The processing unit controls the sensor module to detect the light rays under a plurality exposure conditions for generating a plurality of images each including a plurality of light spots, obtains a plurality of light spot datasets corresponding to the light spots and each including a plurality of pixel coordinate sets and a plurality of pixel values, and obtains wavefront information associated with the light spots based on the light spot datasets of at least two of the images.

Abstract: An optical device is adapted for coupling to a camera lens so as to form a visual observation system. The optical device includes a housing, a connecting unit disposed at the housing, a first lens set disposed in the housing and having a negative optical power, a prism unit located at an image side of the first lens set in the housing, and a second lens set located at an image side of the prism unit in the housing and having a positive optical power. The connecting unit includes a camera lens bayonet for connecting to the camera lens. The prism unit has a light-entrance surface and a light-exit surface. An image formed by light beams exiting the light-exit surface is erected with respect to an inverted image formed by light beams entering the light-entrance surface.