[Mircea Pteancu]

Mii de bombe si de pipe!Cristian ,ia citeste tu textul de mai jos.Alt exemplu,drag mie: Bernard Schmidt a fost un optician autodidact foarte competent,pentru care teoria era la fel de importanta precum una dintre surubelnite,dar ursuz,destul de antipatic si cu prieteni putini.(Tipii perseverenti din acest brand de obicei au bani si amante multe).Ce noroc pe el,altminteri cineva-i demonstra ca optica ce voia el sa slefuiasca este imposibil de realizat.Respecta teoria dar ''grind more ,worry less''.Mircea






CLACEY
John Clacey was born in Massachusetts in 1857. As a young man, Clacey
ordered books and glass blanks for a six inch doublet, and in teaching himself
lens grinding, by repeated failures reduced the blanks to a thinness that
caused them to flex while being worked. He was forced to order another pair of
blanks and with these made a successful telescope and began developing his own
techniques of local correction followed by testing with an artificial star, for
[b]he did not believe that following the mathematical formulas of lens designers
gave him a satisfactory product. [/b] He made instruments designed by S. C.
Chandler: the almucantar (used to detect the variation of latitude) and the
chronodeik (used to determine true local time). Clacey set up shop in
Cambridgeport, and made many refractors of three, four, and five inches
aperture, and over time made them of shorter focus, such as four inch f10
models, and one five inch f4.2. These were sold to amateurs and to the
U.S.N.O., the Coast & Geodetic Survey, the Blue Hills Meteorological Obs.,
Brook's Smith Obs., the Japanese Navy, and others

[Doru Dragan]

Aveam noi doi (eu si Mircea Pteancu) un prieten care din pacate acum e printre stele. De cate ori imi exprimam indoiala ca un instrument pe care-l vedeam in Sky & Telescope ar putea fi facut aici in Romania de catre noi, replica lui era: "instrumentul ala a fost facut tot de un om".
Lasand amintirile, trebuie spus ca e pacat sa repeti toate greselile pe care le-au facut inaintasii tai. S-a acumulat intre timp multa experienta si e de preferat sa mergi pe un drum cat mai drept. Construirea acromatelor, apocromatelor si super-apocromatelor este o munca foarte dificila. La ora actuala exista programe de proiectare optica care pot scurta obtinerea unor rezultate. Si asa raman suficiente probleme dificil de rezolvat. Obtinerea sorturilor de sticla, obtinerea si verificarea curburilor, diversele acoperiri etc. Pentru cei mai multi de pe acest forum toate astea sunt aproape science-fiction.