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catra

21 Ian 2020 13:56



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Salutare si la multi ani!
Cand credeam ca nu mai este nimic de stiut, m-am apucat sa rasfoiesc site-ul lu' Baader si am gasit asta in raspunsurile de suport pentru prisma T2 (atasez citatul doar ca pe un nou datapoint; multumesc mult pentru raspunsurile anterioare)

The 32mm star diagonal (#2456005) is produced in the regular way - just like prisms are being made since four hundred years - without ANY coating applied onto the hypothenuse (reflecting) face. Please also check our website, nowhere do we state that this star diagonal would feature our BBHS-coating.

Any beam of light that will hit that uncoated surface under exactly 45° of incoming angle will undergo a "total reflection" (as soon as there would be a regular antireflection coating applied onto that reflective face, the performance would suffer greately). For ages Carl Zeiss had preferred the total reflection of prisms versus the reflective surfaces of mirrors, because until recently mirrors did tend to age (produce haze) very quickly.