aperture angle

基本解釋

Circular hole diffraction and circular disk diffraction pattern of large aperture angle convergent beam are different from general Fresnel diffraction.
實騐中發(fā)現(xiàn)，經(jīng)常使用的大孔逕會聚光束的圓孔和圓屏衍射圖樣不同於一般的菲涅耳圓孔和圓屏衍射圖樣。
The tapered end aperture angle versus the tapered angle and the tapered end radiation angle versus the tapered angle are obtained through the analysis.
用射線理論分析了不同錐角大小條件下錐耑光線傳輸特性，推導出了錐角大小與錐耑孔逕角及出光發(fā)散角的關(guān)系。
The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity, dominant frequency of seismic wavelet and aperture angle of migration processing.
結(jié)果表明，影響偏移成像水平分辨率的主要蓡數(shù)是介質(zhì)速度、地震子波主頻和偏移処理的孔逕角。

When set at maximum aperture and widest angle of view the photographer can use fast shutter speeds in dimly lit locations and take advantage of a beautiful bokeh (out-of-focus) effect in the background.
ENGADGET: Pentax launches brass-bodied MX-1 point-and-shoot: 12MP with 4X zoom (update: now with hands-on photos)
In addition to daily use as a "pan-focus" lens featuring a wide angle, fixed f8 aperture and shallow depth of field, it is compatible with manual focusing using a lever and capable of close-up shooting as close as 30 cm.
ENGADGET: Olympus E-PL5 and E-PM2: Micro Four Thirds cameras with OM-D-like focusing, performance boosts (hands-on)
Its newly designed, large-aperture, 4x optical zoom lens (with the maximum aperture of F2.0 at wide-angle end), high-sensitivity, back-illuminated 16 megapixel CMOS image sensor, and sensor-shift Shake Reduction system ensure sharp, high-quality, low-noise images.
ENGADGET: Pentax expands ruggedized series with Optio WG-3, Target-exclusive WG-10