Open Source Concept PUSH

accipiterraccipiterr Registered Users Posts: 2


To Whom It May Concern:

This is an open letter about an open source concept called PUSH, acronym for portable universal self-contained heliostat. 

A heliostat continuously reflects sunlight towards a fixed target by using a mechanism that moves a mirror to compensate for the Earth’s motion.

Several methods have been employed to automatically control the mirror’s movement.  The approach described here might simplify the task significantly.


PUSH configuration:

A flat 2-sided circular mirror, M, mounted on a 2-axis gimbal, rotates about the gimbal’s base axis, Ab, and cross axis, Ac.  The gimbal is affixed to the inside of a concentric transparent spheral shell.

Ab passes through the center of M and the center of the gimbal base.  Ac passes through the center of M and is perpendicular to Ab.

Motors drive the motion of M, powered by solar energy and controlled by timers, light sensors and simple logic switches.

PUSH operation:

         Ab is manually pointed at the target.

        When direct sunlight is present, the sequence below occurs automatically and repeats periodically.  

        1. M rotates about Ab and stops when Ac is perpendicular to the Sun.

        2. M then rotates about Ac, stopping when the reflected beam aligns with Ab.


With safety and simplicity in mind, design details can vary.

Please consider passing this idea along, if you would be so kind.



Anonymous  20-20


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