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Related Experiment Video

Updated: Jun 16, 2026

Second Harmonic Generation Signals in Rabbit Sclera As a Tool for Evaluation of Therapeutic Tissue Cross-linking (TXL) for Myopia

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SCLERA: an Astrometric Telescope for Experimental Relativity.

J R Oleson, C A Zanoni, H A Hill

|February 4, 2010

Summary

This summary is machine-generated.

A new photoelectric telescope enables precise daytime astrometry of solar neighborhood objects, achieving 0.001 arc second accuracy. This advancement utilizes specialized optics and calibration for improved stellar position measurements.

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Last Updated: Jun 16, 2026

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Area of Science:

Astronomy and Astrophysics
Optical Instrumentation
Astrometry

Background:

Daytime astrometry of objects near the sun presents unique challenges due to solar glare and atmospheric distortion.
High-precision measurements of stellar positions are crucial for understanding stellar dynamics and fundamental astronomy.
Existing instruments may lack the necessary precision or specialized design for near-solar object observation.

Purpose of the Study:

To introduce and detail a novel photoelectric telescope specifically engineered for high-accuracy daytime astrometry.
To achieve unprecedented accuracy (order of 0.001 arc seconds) in measuring the field positions of stars near the sun.
To demonstrate the effectiveness of advanced optical designs and calibration techniques in overcoming observational challenges.

Main Methods:

Utilized a Schupmann medial telescope design with a 12.2-m focal length and f/100 aperture.
Implemented optical corrections for lateral color aberration and apodization to minimize diffracted light.
Employed an accurately measured solar diameter for precise field calibration.

Main Results:

The telescope is now operational at its Tucson, Arizona site.
The design incorporates multiple features specifically aimed at reducing systematic and random errors in measurements.
The system is configured to achieve the target accuracy of 0.001 arc seconds in stellar field position measurements.

Conclusions:

The newly operative telescope represents a significant advancement in daytime astrometric capabilities.
The specialized design and calibration methods enable high-precision measurements of celestial objects near the sun.
This instrument is poised to contribute valuable data for solar neighborhood studies and fundamental astronomical research.