今日難得好好天~

[豆豸苗]

74cm 即係f/6... 尋日同學仔入農莊拋光時我用過software check, 似乎只需要拋物面化少少, 球面或者都唔太差呀.

how about 51cm, any example how curve/watermelon it should be?

左面係 51 cm 焦距0既光柵像. 右面係74cm 焦距0既光柵像~ (假設用蔡sir 提供0既光柵測試)

[訪客]

74cm 即係f/6... 尋日同學仔入農莊拋光時我用過software check, 似乎只需要拋物面化少少, 球面或者都唔太差呀.

how about 51cm, any example how curve/watermelon it should be?

左面係 51 cm 焦距0既光柵像. 右面係74cm 焦距0既光柵像~ (假設用蔡sir 提供0既光柵測試)

thxthx~~
邊度搵呢個software出來的??

[豆豸苗]

thxthx~~
邊度搵呢個software出來的??

咦咦. 你係邊個?
你可以0黎呢度download~
Ronchi for Windows

[alyf]

thxthx~~
邊度搵呢個software出來的??

咦咦. 你係邊個?
你可以0黎呢度download~
Ronchi for Windows

係我呀, 頭先無喇喇logout左!
thxthx~

ask one more thing, what is the meaning of grating offset?

[豆豸苗]

grating 係指張光柵 1mm 內有幾多條黑線.
蔡sir 果0的光柵大約係 1mm 4 條黑線.

[Wah!]

ask one more thing, what is the meaning of grating offset?

呢個係用鏡中心的曲率半徑為基準"0",負值即是把光柵置於這個曲率中心以內,正值即是把光柵置於曲率中心以外.