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<< 7. Avtomatizirovannyi fotometri... | Oglavlenie | 7.2 Usiliteli impul'snogo ... >>
7.1 Chetyrehpolosnyi fotoelektricheskii fotometr
Osnovnoi teleskop, na kotorom rabotali i prodolzhayut
rabotat' v Tyan'-Shan'skoi observatorii GAISh -- eto
48-santimetrovyi kassegrenovskii reflektor AZT-14. Ego
effektivnoe fokusnoe rasstoyanie okolo 7.2 m, a masshtab v
fokal'noi ploskosti:
/mm.
V nastoyashee vremya etot teleskop osnashen fotoelektricheskim
fotometrom, razrabotannym V.G.Kornilovym i A.V.Krylovym dlya
massovyh opredelenii velichin yarkih zvezd v fotometricheskoi
sisteme WBVR. Glavnoi osobennost'yu etogo fotometra yavlyaetsya to,
chto izmeryaemyi svetovoi potok delitsya mezhdu chetyr'mya kanalami
pri pomoshi svetodelitelei. Kazhdyi svetodelitel'nyi sloi
predstavlyaet iz sebya tonkii, chastichno otrazhayushii i chastichno
propuskayushii svet sloi alyuminiya, napylennyi v vakuume na
prozrachnuyu podlozhku. Pervyi svetodelitel'nyi sloi rassheplyaet
ishodnyi potok sveta na dva puchka, kotorye v svoyu ochered'
delyatsya sleduyushimi sloyami na dve chasti kazhdyi. Otnoshenie
intensivnostei otrazhennogo i proshedshego sveta i dolya
pogloshennogo sveta opredelyayutsya tolshinoi napylennogo sloya.
Osnovnaya dolya sveta napravlyaetsya v kanal, prednaznachennyi dlya
izmerenii v ul'trafioletovoi polose. Ostavshiisya svet delitsya
mezhdu drugimi tremya kanalami primerno porovnu. Tochnee, otnoshenie
svetovyh potokov, napravlyaemyh v chetyre kanala sootvetstvenno
ravno:
![\begin{displaymath}
W : B : V : R = 0.6 : 0.1 : 0.15 : 0.15 .
\end{displaymath}](https://images.astronet.ru/pubd/2006/03/01/0001211924/img792.gif)
Pri etom, dlya zvezd spektral'nogo klassa G0 sootnoshenie signalov v kanalah fotometra sostavlyaet sootvetstvenno
![\begin{displaymath}
W : B : V : R = 0.8 : 1.8 : 1.0 : 0.7 .
\end{displaymath}](https://images.astronet.ru/pubd/2006/03/01/0001211924/img793.gif)
V fokal'nuyu ploskost' teleskopa pomeshen blok pereklyuchaemyh diafragm. Vsego predusmotreno 8 diafragm, razmer kotoryh s uchetom fokusnogo rasstoyaniya teleskopa AZT-14 sostavlyaet sootvetstvenno
![$150^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img794.gif)
![$90^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img795.gif)
![$60^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img796.gif)
![$45^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img797.gif)
![$30^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img798.gif)
![$20^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img159.gif)
![$15^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img799.gif)
![$10^{\prime\prime}$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img800.gif)
![$W$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img21.gif)
![$B$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img17.gif)
![$V$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img3.gif)
![$R$](https://images.astronet.ru/pubd/2006/03/01/0001211924/img9.gif)
<< 7. Avtomatizirovannyi fotometri... | Oglavlenie | 7.2 Usiliteli impul'snogo ... >>
Publikacii s klyuchevymi slovami:
Fotometricheskaya sistema - zvezdnaya velichina - fotometriya - spektrofotometriya - atmosfernoe pogloshenie
Publikacii so slovami: Fotometricheskaya sistema - zvezdnaya velichina - fotometriya - spektrofotometriya - atmosfernoe pogloshenie | |
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