Information handling system camera lens with eight elements for improved aperture and reduced blur
AssigneeDell Products L.P.
InventorsYI-Hsien Lin, Chih-Hao Kao, Tuck Leong Lim
Life of this patent
Estimating the term…
Abstract
An information handling system camera provides a ninety degree field of view with low distortion in low light environments by a capturing visual images through a lens having eight lens elements. The first lens element closest to the object and eighth lens element closest to the image each have a glass material, positive refractive power and spherical surface. The middle six lens elements each have a plastic material and aspherical surfaces that direct light to an image sensor through a variety of positive and negative refractive powers.
Claims19
An information handling system comprising:
- a housing;
- a processor coupled in the housing and operable to process information;
- a memory coupled in the housing and interfaced with the processor, the memory operable to store the information;
- a display interfaced with the processor and operable to present the information as visual images;
- and
- a camera having a field of view positioned to capture a visual image of an end user viewing the display, the camera having a lens with eight lens elements ordered from an object side to an image side:
- a first lens element having positive refractive power;
- a second lens element having negative refractive power;
- a third lens element having negative refractive power;
- a fourth lens element having positive refractive power;
- a fifth lens element having a positive refractive power;
- a sixth lens element having a positive refractive power;
- a seventh lens element having a negative refractive power;
- and
- an eighth lens element having a positive refractive power;
- wherein:
- the first lens element and the eighth lens element are glass;
- and
- the second lens element through the seventh lens element are plastic.
A camera lens comprising:
- a first lens element having positive refractive power;
- a second lens element having negative refractive power;
- a third lens element having negative refractive power;
- a fourth lens element having positive refractive power;
- a fifth lens element having a positive refractive power;
- a sixth lens element having a positive refractive power;
- a seventh lens element having a negative refractive power;
- and
- an eighth lens element having a positive refractive power;
- wherein the F-number of the lens is 1.8 or less.
A camera lens comprising:
- a first lens element having positive refractive power;
- a second lens element having negative refractive power;
- a third lens element having negative refractive power;
- a fourth lens element having positive refractive power;
- a fifth lens element having a positive refractive power;
- a sixth lens element having a positive refractive power;
- a seventh lens element having a negative refractive power;
- and
- an eighth lens element having a positive refractive power;
- wherein lens elements two through seven are aspheric.
Dependencies are inferred from the claim text.