Notes and diagrams at a time laboratory
Hydrogen maser
Paris Observatory time operations room
Rubidium caesium atomic clock
Strontium optical lattice clock research
Daniel Gambis, French astronomer
Caesium beam atomic clocks, 1984
Sand dunes research
Calibrating a 3D measurement machine
Sand dunes acoustics research
3D measurement machine probes
3D measurement machine probe
3D measurement machine
Birdwing butterfly research
3D measurement of an object
Apollon laser amplification room
Measurement Probe
Bose-Einstein condensate research
Acoustic properties of soap films
Palaeogenetics lab
Natural product chemistry research
Dinosaur fossil footprint
3D quantum gas atomic clock
Coaxial electrical impedance standards
ITER fusion research reactor construction
Apollon laser
Ytterbium optical clock
Ytterbium optical clock laser
Time Service at US Naval Observatory, 1915
Laser testing
Mars heat shield research, 2015
Cesium atomic clock