| 摘要 |
<p>A scanning system adapted to produce enhanced resolution in an optical scanning device includes means (21, 24) to generate a composite light spot by the superposition of a plurality of light (21, 22) spots of differing size and frequency, means (26) to direct the composite light spot towards a corresponding plurality of frequency selective photoreceivers (28, 29), the photoreceivers being so constructed or selected that each has a peak sensitivity response to only one of the light frequencies and signal processing means (32) to generate from a weighted (30, 31) sum of the response of said photoreceivers a response which corresponds to the scanning with a two-dimensional transfer function of predetermined shape.</p> |
