在多年的經驗和測試下,我們提供許多不同的光學鏡片和鏡頭模組。在我們商城中有提供S-Mount鏡片,M7鏡片,M12鏡片,和M5手機鏡頭模組跟不同的焦距,角度(FOV),和參數。
成像圈(Image Circle)或光學格式是鏡頭對焦到成像焦點時影像清晰的圓圈。在一個相機模組內,有一個長方形感應區域(如 右圖),專門感應圖像的的長寬。不一樣大小的感應器提供不同大小的成像圖。感應器的影像長寬比(aspect ratio)通常是 4:3 或 16:9 (H:V)或 16:9。
鏡頭光學格式應與圖像感應器搭配(如 左圖)。 如果鏡頭格式和圖片格式不同,是可以成圖的,但是鏡頭格式大於圖像感應器時,鏡頭FOV會降低。當鏡頭格式小於於圖像感應器時,相片的四周會有暗區,並且浪費部分感應器來做應用。
FOV 也就是視角,是指這個鏡頭所能接受的影像觀看到的角度,通常會以角度的單位表示。一般視角的量測是以成像對焦在遠距離時來量測計算影像尺寸對比到感應 Sensor 的焦距的三角函數換算成對應的角度。
IADIY 提供客製化或ODM的鏡片模組和光學鏡片, 更多資訊請參閱 Optics ODM 的介紹或 聯繫我們。
First of all, it should be noted that when a lens is shipped from the factory, a "lens inspection projector" is generally used to inspect the resolution of the lens. The resolution index embodied in the lens inspection projector is expressed in lp/mm, that is, the number of line pairs that can be resolved per millimeter (line pair), but generally lens manufacturers do not explicitly mark this index in the specifications, but rather replace it with a more intuitive 1MP, 2MP or 3MP mark.
Regardless of how the lens images, the Pixel Size of the sensor affects the physical limit of its ultimate recognition resolution, which is called the Nyquist Frequency, and the smallest Line Pairs that the camera can resolve will be exactly twice the Pixel Size. However, the Line Pair happens to have Moiré-effects at the Nyquist Frequency, which means that the actual scene cannot be projected exactly on the middle of the Pixel, causing the limit to be sometimes resolved and sometimes not. At 0.66 times the Nyquist limit, the amplitude can remain largely unchanged regardless of the phase. Therefore, empirically we will take 0.66 * Nyquist Frequency as the practical resolution limit, which is equivalent to using 3 pixel sizes for one black and white transformation (Line Pair), so the correction formula is as follows:
Pixel Size = 1/[3*(lp/mm)] Unit:mm
To sum up the above, the lens with Line Pair as the standard can be converted to pixel size, the sensor also uses pixel size as the standard, in the standard above the two can achieve consistency. Therefore, the following criteria are met
To achieve the above two points is the best match. The lens or the sensor is too low or too high is not very suitable, it can be used, but may be limited by a certain party, IADIY will choose the most appropriate match for customers to provide the most suitable products to meet customer needs.