供應(yīng)分劃板（鑒別率板）

英文名：Reticle 　　可檢驗(yàn)分辨率和光學(xué)傳遞函數(shù) 　　分劃板一般安裝在望遠(yuǎn)鏡的右目鏡焦平面上，它是一塊簿的表面刻有分劃密位線(xiàn)的薄玻璃，由于這塊薄玻璃理論上講也參與了成像，延長(zhǎng)了物鏡的焦距，會(huì)對(duì)右目鏡的長(zhǎng)度有或多或少的影響。分劃板對(duì)潔凈度要求高，任何微小的灰塵都會(huì)在觀測(cè)時(shí)產(chǎn)生很大的黑點(diǎn)，同時(shí)分劃板的安裝位置要求高，因此，盡量不要拆卸，如果拆卸，要按原樣復(fù)原。 　　Reticle 　　From Wikipedia, the free encyclopedia 　　A comparison of different reticles used in telescopic sights. The lower right represents a reticle found in the scope of a Russian SVD sniper rifle."Reticle" redirects here. For the pattern used in photolithography, see photomask. 　　"Crosshair" redirects here. For the fictional characters in Transformers, see Crosshairs (Transformers). 　　A crosshair or reticle is a shape imposed on an image that is used for precise alignment of a device. Crosshairs are most commonly represented as intersecting lines in a "+" shape, though many variations exist, including dots, posts, circles, scales, chevrons, or a combination of each. Most commonly ociated with telescopic sights for aiming firearms, crosshairs are also common in optical instruments used for astronomy and surveying, and are also popular in graphical user interfaces as a precision pointer. The crosshair was invented by Robert Hooke, and dates to the 17th century. 　　The word reticle is from the Latin meaning "net", a network or grid of lines displayed in an optical instrument. The minimum reticle consists of simple "cross-hairs", as described above.