終於訂了304APO....

[mwtse]

社長，
有沒有考慮做一个遙控 Slide roof，租 D pier 比人做遙控天文臺？

幾支屬於不同人的望遠鏡處於同一屋簷下，所謂相見好、同住難，都幾複雜。

[社長]

社長，
有沒有考慮做一个遙控 Slide roof，租 D pier 比人做遙控天文臺？

幾支屬於不同人的望遠鏡處於同一屋簷下，所謂相見好、同住難，都幾複雜。

同意Tse sir所說，也經歷過，這樣做只會造成大量無謂爭端。

我很樂意不時接待APM同學會或Astrocafers到我的西藏天文台觀星拍攝，甚至已為大家建立好流動戰鬥群，但永久性的放置器材，將會是災難的開始。

有了西藏天文台，等於在這百多萬平方公里的高原有了進可攻退可守的據點，其高海拔低緯度得天獨厚，加上高晴天率，在北半球沒有其他點能吸引我了。所以我不想把無謂的人事糾紛帶到這片純淨的星空樂土。實際上在中科院的土地上，這樣的操作要得人家同意，而我也沒興趣去搞這樣的交易。

我今天下午到了拉薩，飛機在四川及西藏交界的一群雪山遇到氣流，顛簸了半小時，睡了一覺到傍晚醒來，現在還有點暈，這是在西藏建立私人天文台的最大代價吧。

[社長]

Let's day dream about the technologies 10 yrs later....

10 年內 CCD/CMOS 會有好大的進步，像素、靈敏度、訊噪比、動態範圍都會提升。顯示屏會全面使用高清，肉眼再不能分辨像素，輔助目視會越來越流行。

光學方面，發明了新的納米科技塗層，既可以保護反射鏡的鏡面不會氧化，亦可以防止鏡面上形成熱空氣層，用紫外線照射時更有自動清潔功能。

Goto 望遠鏡開始加入自動導星作為標準配備，配合輔助目視附有自動對焦功能。

調焦筒使用形狀記憶合金，以電流準確控制焦點，消除電動機機械精度的影響。

最好引入民用的 adaptive optics

2006年我在巴黎參觀天文望遠鏡展，看到這樣的海報，Tse sir可以考慮一下：

[mwtse]

http://www.cloudynights.com/ubbthreads/ ... ll/fpart/1

I recently visited my engineering friends at a small development company in north Georgia to see what was in the works for this year. They described a device for a telescope that will greatly reduce the distortion caused by irregularities in the atmosphere. It is intended primarily for SCT and refractor telescopes.

The device design is taken from the Air Force laser missile defense system installed in a Boeing 747. This system uses two lasers to destroy an incoming missile. The first laser illuminates the missile and uses the returned image to calculate the distortion along the path. The information is applied to the back of a mirror directing the second kill laser to the target. The outgoing beam is distorted in a fashion whereby the atmosphere will bring it back to a focused spot suitable for missile destruction. The distortion mirror is being manipulated on the backside by an array of push/pull devices.

In the telescope version, the device is inserted in place of the traditional diagonal. The beam splitter is positioned in front and the distorter behind the mirror. The beam splitter in the first version is the traditional type, a partially silvered mirror set in the path at 45°. A second version is being considered using a clear glass plate with 1/4 of the surface coated as a full mirror in a pie shape. The disk is held in place by a mag-lev device and spun by peripherally wound motor windings. In this fashion, there is no axle across the image path and a full image is split off but only 1/4 of the time. The image is analyzed using a Raspberry Pi Linux embedded processor.

The mirror distorter is a 16x16 array of piezoelectric translators bonded to the back of the mirror in the diagonal portion. In the industrial world, they are called inch-worms and are used for very small and precise linear movement. These are driven by an Arduino processor so that the Raspberry can be dedicated to image processing. Preliminary test show that 16x16 may not be quite enough points of distortion so the plan is to go to 32x32.

This device is expected to sell for around $500 in it's initial phase but come down later to the $195 region. This will be especially valuable to the AP crowd. Further information can be obtained from Git-R-Dun Engineering in Budweisenheimer, GA.

Inchworm description:

http://en.wikipedia.org/wiki/Inchworm_motor

[社長]

另外有沒有一些可以打穿大氣層的工具?

大致上能從我的Dob 16 GOTO前端，向上空100公里左右厚度的大氣層，開一條直徑400mm的真空管便可以，那我便可以不受天氣光害視寧度等影響，無日無之觀星了。

[mwtse]

另外有沒有一些可以打穿大氣層的工具?

大致上能從我的Dob 16 GOTO前端，向上空100公里左右厚度的大氣層，開一條直徑400mm的真空管便可以，那我便可以不受天氣光害視寧度等影響，無日無之觀星了。

需要先解決兩個問題，其一是粗略估算過打開這條通道需要 600MJ 的能量，另加維持所需，及器材運作的效率不會高於 10%，相信普普通通一座發電厰應該可以提供。大軍未動糧草先行，社長先建一座發電厰，我們再開發這一種工具，相比送一台望遠鏡上太空，這辦法實在便宜太多，發電厰在日間還有剩餘電力可以發售

其二是航空安全問題，搞不好珠三角會變成百慕達三角第二

[社長]

很明顯貴過US195，我不玩了。

[社長]

上週一付了HK$800,000訂金，最快今夏付運。

韓國慢一步，他們訂的2台304 f7.5 APO及一台304 f12.5 APO，最快也要兩年付運。

203或以上APO，APM是全球主導者

愚人節玩笑成真

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