Edwin 的瀝青模 修鏡過程

[Wongsir]

Edwin,

How long?
It seems ok, the mirror is on the way of parabolization .
Carry on, using the same period--5 or 10 minutes more, and take a Ronchigram again.

Wongsir
2012-07-17

10mins

now one is 5mins more. seem need 5 more mins？

Edwin,

Yes.
Refer to your notes, compare the degree of curvature of parabolization for your f ratio.

Wongsir

[豆豸苗]

可參考:
http://www.hkastroforum.net/viewtopic.php?t=2180
不過呢0的係焦點內0既圖.

[fatty]

5mins 3/4W f/5
seem still need more time......

[豆豸苗]

可參考:
http://www.hkastroforum.net/viewtopic.php?t=2180
不過呢0的係焦點內0既圖.

仲有留意呢0的係用 4 lines / mm 0既光柵.
你地0的光柵係幾多 lines / mm?

另可以自己 download 個 software simulate:
http://www.atm-workshop.com/ronchi-sim.html
頁面最下面
Ronchi for Windows software (zip file) 果條 link

[fatty]

10mins 3/4W f/5

差不多了？還是仍需要努力？

[豆豸苗]

你個影像好光, 有0的難睇, 你可以用下面幅圖對照一下

120mm 直徑, f/5, 4 lines / mm grating
曲率半徑後, 睇 6 條 grating.

[豆豸苗]

sorry, 頭先果張錯左, sim 左 f/4. XP
update 完呢張先0岩呀.

[Wongsir]

10mins 3/4W f/5

差不多了？還是仍需要努力？

Edwin,

It's ok.
Hand on your mirror to me tonight.

Wongsir
2012-07-17