optical homodyne receiver
光学零拍接收机

• aureole
• Aurora
• aurora australis
• aurora borealis
• auroral cap
• auroral emission
• auroral light
• Auroral Line
• auroral photometer
• auroral region
• auroral spectrum
• auroral zone
• authentication
• authentic sample
• auto-alarm
• autoanalyzer
• autocap
• autocartograph
• autochrome
• autoclave
• autocoder
• autocollimatic spectroscope
• autocollimatiion
• auto-collimating
• autocollimating eyepiece