With a pixel-level digital camera, and our consumers on the image quality requirements are also increased. Optical low-pass filter is the digital camera sensitive components on a device, which plays a vital role. Traditional optical low-pass filter using three general quartz plate structure, and this structure has been left behind in the race could not be uniform all the spectral separation, not the desired effect. The Epson and design new products through two intermediate quartz plate with a sandwich, thereby evenly from all unified visible spectrum has greatly improved the image quality. Because only the two quartz plate, this new type of OLPF than the traditional three to thin design structure
Epson toyocom company on the 6th released a digital camera used in the new optical low-pass filter (OLPF), combined with the two quartz plates new products all the visible spectrum can be separated evenly.
The new OLPF and other crystal devices will be on display at the Epson Toyocom booth (No. 6E116) at Ceatec Japan 2007, to be held at Makuhari Messe from October 2-6.
* Moir¨¦ patterns
A lined pattern that appears when two regularly spaced sets of repeating lines are superimposed. A moir¨¦ pattern may appear in digital photos when a pattern in a subject is superimposed on the pixel array of a digital imaging device. Moir¨¦ patterns occur when the geometric pattern of a photo subject changes at a narrower spatial frequency than that of the picture elements (pixels) of a CCD or CMOS sensor. Using the ability of quartz to separate light rays, the OLPF divides and regulates incident rays so that they strikes surrounding pixels. Fig. 2 shows that whereas the conventional OLPF is unable to uniformly separate light incident on the area where lines intersect, the new OLPF is able to uniformly separate the incident light and thus eliminate moir¨¦ patterns
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