A novel compact 4-channel beam splitter based on a K\"osters-type prism

07778 Tautenburg; ((1) Max-Planck Institute for extraterrestrial Physics; (2) Th\"uringer Landessternwarte Tautenburg; 85478 Garching; Germany; Germany); Jochen Greiner (1); Uwe Laux (2)

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A novel compact 4-channel beam splitter based on a K\"osters-type prism

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arxiv 2112.05963 v1 pith:JMB6M7VN submitted 2021-12-11 astro-ph.IM

Jochen Greiner (1) , Uwe Laux (2) , ((1) Max-Planck Institute for extraterrestrial Physics , 85478 Garching , Germany , (2) Thüringer Landessternwarte Tautenburg , 07778 Tautenburg , Germany) This is my paper · ORCID

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We introduce a novel compact 4-channel beam splitter which is based on a combination of dichroic coatings and internal total reflection, similar in concept to the interference double-prism invented by K\"osters 90 years ago. Used with a rapidly-slewing 50 cm telescope in space, this would allow to double the presently known gamma-ray bursts at high (>5) redshift within 2 years.

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