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The Technology of Manufacture of a Positive Lens of Achromatic Dublet
Rail, Zdeněk ; Melich, Zbyněk ; Šrajer, Bohdan ; Šípová, Gabriela ; Ulrichová, Iva ; Franců, Helena ; Melich, Radek ; Vápenka, David ; Tomka, David ; Thoř, Tomáš
This paper deals with manufacturing of a positive lens of achromatic dublet. Diameter of the dublet is 158 mm and its focal length about 2500 mm. The glass material of the former lens was inhomogeneous and the dublet provided bad images. This is why we decided to manufacture new lens. The process was made by means of former machines of our workshop. The telescope with this dublet is placed at the Observatory of Turnov and serves for public astronomical observation.
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Methodology of camera spectral response measurement
Melich, Radek ; Václavík, Jan ; Žídek, Karel
Spectral response of the camera will be measured using monochromator in conjunction with an integration sphere. Camera without objective will be placed in one port of the integrating sphere and light beam from monochromator will be fed into perpendicular port. Sensor of the camera sensor will be therefore uniformly illuminated by diffused light from monochromator. Proposed FWHM of the monochromator is 15 nm as a trade-off between light intensity provided by monochromator and deformation of spectral characteristic (Picture XY). Diameter of the integrating sphere has to be larger than 100 mm to ensure uniform illumination over sensor area.
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Reflectivity of a mirror in XUV spectral region (46.9 nm).
Schmidt, Jiří ; Koláček, Karel ; Štraus, Jaroslav ; Frolov, Oleksandr ; Prukner, Václav ; Melich, Radek ; Psota, Pavel ; Sobota, Jaroslav ; Fořt, Tomáš
A focusing mirror as an optical element is used in our applications that require light collection (e.g. for laser ablation studies). A knowledge of the mirror reflectivity is important for determination of focused laser pulse energy, or for determination of local fluencies near the laser focus. The reflectivity of our spherical focusing mirror with(/without) multi-layer coating was measured. Reflection coefficients of this mirror in a long period of time are also reported. Further, the incidence-angle dependence of the XUV reflectivity of flat mirrors is presented as well.
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METIST mirror M1 FS
Lédl, Vít ; Melich, Radek ; Vít, Tomáš
Scope of the document is to provide required test results with respect to the structure and optical performance of individual optical surfaces of M1 mirror, FS version. The mirror has a unique numbering M1-C20-23.
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METIS mirror M2 FS
Lédl, Vít ; Melich, Radek ; Vít, Tomáš
Scope of the document is to provide required test results with respect to the structure and optical performance of individual optical surfaces of M2 mirror FS version. The mirror has a unique numbering M2-C21-24.
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