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The polychromatic APQ JENA family with apertures from 100mm to 250mm is almost complete
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APQ 150/1200 Fluorite Quadruplet Polychromat: Strehl Ratio vs. Wavelength (365nm – 1014nm) – Comparison between Polychromat and Apochromat
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APQ 150/1200 Fluorite Quadruplet Polychromat
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Only through the extreme we reach clarity
Friedrich Schiller 1759-1805

Astronomical optics from Jena

APQ JENA brings astronomical optics and instrument technology back to life after 25 years in Jena.

The basis for this is the existing competence, the specialist knowledge of the scientists, developers, engineers and specialists as well as the more than 100-year tradition of the Astro Jena site.

The production takes place in Jena Made in Germany. The small series character also allows for individual and special production as well as the consideration of individual customer wishes.

Fluorite Quadruplet Polychromats

The focus of our development and manufacturing program is on completely new Fluorite Quadruplet Polychromats, which are significantly superior to conventional doublet and triplet apochromats.

The main feature of the four lens design is the polychromatic correction with a diffraction-limited imaging quality over a spectral range from 365nm (UV) to 1014nm (IR), which will benefit both visual observers and especially astrophotographers.

These are the first polychromats as astronomical optics, which we are now making available to a broad user group.

Polychromat 150/1200

The Polychromat 150/1200 – the first model of the new refractor series – can now be ordered.

Benefits for visual observation

In the peripheral regions of the visual spectrum there is no decrease of the Strehl ratio near or below the diffraction limit as is the case with most apochromats.

The images of the polychromats are brilliant and bright, almost free of chromatic aberrations, astigmatism, coma, aperture and Gaussian errors; the theoretical resolution is almost reached.

Advantages for astrophotography

For the first time, the Fluorite Quadruplet Polychromats fully exploit the UBVRI spectral range of modern CCD and CMOS sensors.

With the newly developed Focal Reducer Corrector and Field Corrector with lenses made of CaF₂, vignette-free images are also possible in combination with current CMOS sensors.

By making previously unobservable structures visible in the UV and IR, we open up completely new areas of research and activity for our customers.

Use in science and industry

New application possibilities open up in industrial research, sciences, optronics and environmental technology.

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