Glossary - alphabet order - "H"

Half wave plate

It gives a light path difference of a half wavelength (phase difference δ = 180° + N × 360°, N is an integer ) to two linearly polarized light (parallel and perpendicular light components) when light passes through the half-waveplate. It rotates the plane of polarization by the required angle.


Hermetic seal

A hermetic seal is part of a metal can package that allows a lead (pin) to protrude from the package while maintaining the vacuum condition and insulation of the output signal.


Structure diagram of crystal unit

Hertz

Hertz is a unit of frequency. See "Hz".

Reference: Hz , frequency


High frequency

The high frequency band is in the megahertz (MHz) section of the frequency spectrum.

Reference: Frequency band


Hz

This is the symbol for Hertz, a unit of measure for frequency. 103 Hz = 1 kHz (kilohertz), 106 Hz = 1 MHz (megahertz), and 109 Hz = 1 GHz (gigahertz).


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