Renseignements généraux

Nº de série

6761

Nº de partie

2

Nombre total de parties

3

Ou

S/O

Brevets

S/O

Description générale

GLASS, METAL & SYNTHETIC COMPONENTS.

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

S/O

Largeur

S/O

Hauteur

S/O

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Astronomie

Catégorie

Équipement d'observation

Sous-catégorie

S/O

Fabricant

Ou

Inconnu

Pays

Inconnu

État/province

Inconnu

Ville

Inconnu

Contexte

Pays

Canada

État/province

Ontario

Période

THIS FILTER PRESUMABLY USED C. 1970- 1992.

Canada

THIS FILTER WAS PART OF THE OTTAWA RIVER SOLAR OBSERVATORY INSTALLATION. IT WAS USED ON TELESCOPE 930297, AN INSTRUMENT UNIQUE TO CANADA & THE WORLD. THE 1992 RETIREMENT OF THE ORSO SIGNIFIED THE END OF OPTICAL SOLAR PHYSICS RESEARCH AS CONDUCTED BY CDN GOV'T SCIENTISTS- AN AREA OF STUDY CONCENTRATED IN OTTAWA SINCE 1905.

Fonction

USED ON SOLAR TELESCOPE AS AID IN PHOTOGRAPHY OF SPECIFIC AREA OR SPECTRUM OF PHOTOSPHERE. USED ALSO TO CONTROL PATH OF LIGHT TO MONOCHROMATOR..2 &.3 USED TO REGULATE TEMPERATURE OF FILTER.

Technique

THIS FILTER, HAVING A 1A (ANGSTROM) TO 0.5A BANDPASS, WAS PART OF THE OPTICAL ARRANGEMENT USED TO PERFORM AN H-ALPHA PATROL OF ENTIRE DISC AND OF LIMB FEATURES OF CHROMOSPHERIC MATERIAL. PHOTOGRAPHY OF THE WIDE BAND OF THE CONTINUUM WAS SIMULTANEOUS WITH THAT OF AN AREA -8+ A FROM THE H-ALPHA LINE CENTRE. (REF.2 P.4). THERMOMAT CONTROLLED TEMP. OF FILTER, A CRITICAL FACTOR

Notes sur la région

Inconnu

Détails

Marques

.1 Mfr's plate screwed to filter casing reads " B. Halle Nachf./ Berlin-Steglitz./ Filter No 85 ". Purple decal applied to right of plate reads " HERZBERG INSTITUTE/ OF ASTROPHYSICS/ H1A- 00045/ ASTROMONY SECTION ". White decal applied below reads " Property of/ Propriete du/ NRCC/CNRC/061714 ". All controls labelled./ PT wooden box bears red dymo tape label reading " HALLE H. ALPHA FILTER "/.2 Thermomat bears' mfr's plate marked " Thermomat/ Nr. 6761/ 110V~ 90 W ". Green dymo label on front panel reads " DO NOT TOUCH METER/ CONTACT MAY CAUSE STATIC ERROR ". Red dymo label, beside, reads " THERMOSTAT/ HALLE H. ALPHA FILTER "./ .3 Green dymo label reads " HALLE FILTER/ CONTROLLER". Red dymo label reads " LEAVE AT 6.48 "

Manque

NONE.

Fini

OUTER CASING/MOUNTING ASSEMBLY HAS FLAT BLACK FINISH; FITTED WITH WHITE SYNTHETIC ADJUSTMENT DIAL. MOST OF LENS CASING EXTERIOR HAS DIMPLE-TEXTURED MEDIUM GREY FINISH; DARK-GREY AND BLACK TRIM. TEMPERATURE & FINE ADJUSTMENT SCALES, AND LEVEL PROTECTED WITHIN GLASS ENCLOSED HOUSING.

Décoration

S/O