鏡頭對(duì)焦測(cè)試卡簡介
鏡頭對(duì)焦測(cè)試卡YE0110用于測(cè)試鏡頭的整體對(duì)焦，調(diào)整鏡頭，檢查鏡頭各區(qū)后焦及分辨率。測(cè)試卡由9個(gè)扇形星組成，在圖像各個(gè)區(qū)域均勻分布。扇形星的中間白色部分是外徑的10%。在扇形星內(nèi)有兩個(gè)圓形線條，內(nèi)層圖形是一個(gè)625線的結(jié)構(gòu)，較大圓線是312線結(jié)構(gòu)。
The test chart consists of 9 sector stars, distributed equally over the picture area. The unresolved center of the sector star is 10% of its outer diameter. Within the sector stars are two circular lines. The inner one marks a 625 line structure, the larger circular line marks a structure of 312 lines.
The test chart is designed for
adjustment of camera lenses
checking back focal distance
checking resolution over the picture area
