Patent ID: 9723292
Date: 2017-08-01
CPC Classifications: G02B,G03B,H01L,H04N

Claim:
1. An imaging device comprising: a multifocal main lens having m focal points, where m is an integer larger than 1, the multifocal main lens being a double-convex single lens comprising a first region with a first convexity defining a first focal distance for first-distance imaging and a second region with a second convexity, different from the first convexity, defining a second focal distance for second-distance imaging, the second distance being farther than the first distance, the first region and the second region being separated from each other by a light shielding band arranged to prevent crosstalk between light beams passing through the first and second regions; an image sensor having a plurality of pixels configured of two-dimensionally arranged photoelectric converting elements; a multifocal microlens array including a plurality of microlens groups having different focal distances disposed on an incident plane side of the image sensor, the multifocal microlens array having n focal points, where n is an integer larger than 1; and an image obtaining device which obtains from the image sensor, m×n images respectively at a plurality of focal distances obtained by combining the multifocal main lens and the multifocal microlens array.