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US 2013/0293756 A1Published application
Image Pickup Optical System and Image Pickup Apparatus Using the Same
AssigneeOlympus Corporation
InventorTakuya Ohtsu
Life of this patent
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Abstract
An image pickup optical system made of five lenses, includes in order from an object side, an aperture stop, a first lens L1 having a positive refracting power, a second lens L2 having a negative refracting power, a third lens L3 having a positive refracting power, a fourth lens L4 having a positive refracting power, and a fifth lens L5 having a negative refracting power. Moreover, an image pickup apparatus includes this image pickup optical system.
Claims20
An image pickup apparatus, comprising:
- an image pickup optical system;
- an electronic image pickup element having an image pickup surface to receive an image from the image pickup optical system;
- and
- an auto-focus mechanism,
- wherein
- the image pickup optical system comprises in order from an object side:
- an aperture stop;
- a first lens having a positive refracting power;
- a second lens having a negative refracting power;
- a third lens;
- a fourth lens having a positive refracting power, wherein a surface on an object side is concave shaped;
- and
- a fifth lens having a negative refracting power,
- wherein
- an air space is provided between the second lens and the third lens, and
- at least one of surfaces of the fifth lens has an inflection point.
13 more elements
An information terminal, comprising:
- an input section which operates the information terminal;
- a processing section which processes information at least from the input section;
- an image pickup apparatus which obtains image information based on information from the processing section;
- an image processing section which processes image information obtained by the image pickup apparatus;
- and
- a display section which displays the processed image,
- wherein
- the image pickup apparatus includes an image pickup optical system, an electronic image pickup element having an image pickup surface to receive the image from the image pickup optical system, and an auto-focus mechanism,
- the image pickup optical system comprising in order from an object side:
- an aperture stop;
- a first lens having a positive refracting power;
- a second lens having a negative refracting power;
- a third lens;
- a fourth lens having a positive refracting power, wherein a surface on an object side is concave shaped;
- and
- a fifth lens having a negative refracting power,
- wherein
- an air space is provided between the second lens and the third lens, and
- at least one of surfaces of the fifth lens has an inflection point.
16 more elements
Dependencies are inferred from the claim text.