VX6854LC datasheet(84/114 Pages) STMICROELECTRONICS

tên linh kiện	VX6854LC

Giải thích chi tiết về linh kiện	QXGA EDOF camera module

PDF	114 Pages

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nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

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84 / 114 page

EDoF control

VX6854LC

84/114

DocID027110 Rev 2

EDoF control

The VX6854LC module uses a fixed focused lens with optical aberrations that the EDoF

reconstruction engine is designed to recover the resolution and increase the depth of field in

the range of 20 cm to infinity. The focus is tuned for far distances > 2 m but for closer

distances where a standard fixed focus camera would show a blur image, the EDoF

correction is capable of significantly recovering the resolution.

Figure 31. What is sharp?

Facts about optics

•

The depth of focus narrows with reduction in object distance or with aperture increase.

•

If the lens is focussed at the hyper-focal distance, the sharpness will be the same from

hyperfocal/2 to infinity.

•

The depth of field is defined by the range of scene distances that appears acceptably

sharp in the image.

•

The size of a pixel (1.75 um) can be defined as a blurred spot. A blurred spot smaller

than 1.75 um is registered as sharp. Above that value the spot will look blurred (refer to

circle of confusion graph).

VX6854LC bảng dữ liệu(PDF) 84 Page - STMicroelectronics