NEWS ニュース
Interference rings projected by test plate glasses
Precisely arranging diamond pellets
Grinding skill that determines the identity of an optical element
Bringing back the slotted-head screw
Diaphragm blade design and assembly
Tools we make and use ourselves
Plating to perfection by hand and eyesight
Individually matching rectilinear keys and guides
Helicoid lapping
Coloring by hand