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☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Trouble with Foucault tester - ATM, Optics and DIY Forum - Cloudy

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Trouble with Foucault tester - ATM, Optics and DIY Forum - Cloudy

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Looking for advice for building Foucault tester - ATM, Optics and

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

A Foucault tester is born - ATM, Optics and DIY Forum - Cloudy Nights

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Making and Testing a Telescope Mirror

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Stellafane ATM: Understanding Foucatult Testing

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Looking for advice for building Foucault tester - ATM, Optics and

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Looking for advice for building Foucault tester - ATM, Optics and

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

A Foucault tester is born - ATM, Optics and DIY Forum - Cloudy Nights

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Berthold Hamburger's Homepage/Foucault Tester

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Foucault Testing 8-inch F/6 (18Jan22) - English

☆Matthijs Burgmeijer on X: Busy building my first Foucault knife-edge tester that I will use to do optical testing to measure the shape of concave curved mirrors used in reflector telescopes. #telescope #

Foucault test: a quantitative evaluation method