Manufacture of big aperture lightweight paraboloidal mirror is one of the key techniques for the research of the Cassegrain optical system.

研制某卡塞格林光學(xué)系統(tǒng)的關(guān)鍵技術(shù)之一是通光口徑超過1000mm的輕質(zhì)拋物面主反射鏡操BB一区二区。該反射鏡相對口徑為1/2AV免费在线观看福利网址，減重率為65%，是目前國內(nèi)最大口徑的輕質(zhì)非球面反射鏡a一黄色网。

This is the paraboloidal mirror at the bottom of the tube.

主鏡在线欧美三级片。是位于鏡筒底部的一塊拋物面鏡。

Others began considering the virtues of a concave paraboloidal mirror as primary receptor: it had been known since Antiquity that such a mirror would bring parallel incident rays to a focus at one point.

其他人開始考慮的美德国产白白视频在线观看，凹拋物面反射鏡作為主要受體：它已被稱為自古以來這樣的一面鏡子欧美视频精品二区，會(huì)帶來平行事件射線的焦點(diǎn)在1點(diǎn)。

As to manufacturing a Φ1800mm, F/1.5 large paraboloidal mirror, three structure models with different thickness of base plate were calculated and analyzed respectively.

以加工Φ1.8m免费被操视频在线观看、F/1.5的大口徑拋物面主鏡為參照亚洲性色狠操，分別對三種結(jié)構(gòu)模型在不同基盤厚度時(shí)進(jìn)行了變形仿真計(jì)算。

It was found that for large aperture ratios (the ratio of focal length of the primary to its aperture, as the f-ratio in modern cameras for instance), f/10 or more, the difference between spherical and paraboloidal mirrors was negligible in the performance of the telescope.

結(jié)果發(fā)現(xiàn)不下载看a人免费大片，大口徑的比例（比例焦距初級到其孔徑人人艹在线视频，由于架F -比率在現(xiàn)代相機(jī)舉例來說）， f/10或更長時(shí)間无套系列.梦久久，之間的差別球面和拋物面反射鏡是微不足道的看久久久久久久一级毛片，在表現(xiàn)望遠(yuǎn)鏡。

paraboloidal：拋物面的 拋物線體

paraboloid-shell 拋物面型殼 | paraboloidal 拋物面的 拋物線體 | paraboloidalantenna 旋轉(zhuǎn)拋物面反射器

paraboloidal：拋物面的

paraboloid 拋物面 | paraboloidal 拋物面的 | paraboloidal 拋物線體

paraboloidal：拋物線體

paraboloidal 拋物面的 | paraboloidal 拋物線體 | parabolus 貧病救助員

paraboloidal mirror：拋物面鏡

paraboloid condenser 拋物面聚光器 | paraboloidal mirror 拋物面鏡 | paraboloidal reflector 拋物面反射器

paraboloidal mirror：拋物[旋轉(zhuǎn)]面鏡= 拋物面鏡

parabolic mirror 拋物面鏡= 拋物柱面鏡 | paraboloidal mirror 拋物[旋轉(zhuǎn)]面鏡= 拋物面鏡 | paradox 弔詭== 佯謬