| 摘要 |
<p>In order for an ordinary user of a normal camera to obtain a super wide angle image, he or she had to implement an additional wide angle lens which causes extra cost of purchasing. Not to mention this extra cost, the structure of a conventional super wide angle lens is such a complex that numerous element lenses are needed to constitute a wide angle lens. And as number of element lenses of conventional wide angle lens increases, the amount of light coming thru the wide angle lens decreases which makes the image darker and shadier. Therefore, the need of this invention which satisfies all the functions of a conventional wide angle lens arose to eliminate the high cost and complexity of conventional wide angle lens by reducing the size and numbers of element lenses.</p> |
