Patent ID: 7245362
Filing Date: 2007-07-17
Classification: G01M

Abstract:
1. A lens meter for measuring optical characteristics of a subject lens to be measured, the lens meter comprising: a measurement optical system having a calculation part which obtains the optical characteristics of the subject lens based on a photo-receiving result by the photo-sensor; detecting means for detecting an alignment condition of one of a desired position and a desired region of the subject lens with respect to the measurement optical axis; a display part which displays a screen for alignment; and a display control part which provides fixed display of a target mark indicating one of a measurement position and a measurement region of the subject lens at a predetermined position in the screen and provides movable display of a lens mark representing the subject lens and a guide mark indicating one of a target position and a target region in alignment of the subject lens in the screen based on a detection result by the detecting means, where a movement direction of the subject lens relative to the measurement optical axis coincides with movement directions of the lens mark and the guide mark relative to the target mark.