Two-channel tunable monochromatic illuminator with a concave diffraction grating and an original scanning system

Area of Science:

• Optics and Photonics
• Optical Instrumentation

Background:

• Monochromatic illuminators are crucial for various optical measurements.
• Existing designs may have limitations in scanning capabilities or complexity.

Purpose of the Study:

• To design and analyze a novel two-channel monochromatic illuminator.
• To explore its potential applications in optical measurements.

Main Methods:

• A scanning system with two rotational plane mirrors was designed.
• Light is diffracted by a concave diffraction grating to the ±1 orders.
• The system directs light to two exit slits for two channels.

Main Results:

• Minimal deviation of reflected light direction during scanning was achieved.
• Aberration characteristics were analyzed for different holographic diffraction gratings.
• Potential applications in measuring human eye color sensitivity and diffraction grating efficiency were discussed.

Conclusions:

• The designed illuminator offers a versatile and potentially efficient solution for monochromatic light delivery.
• The system's design facilitates multiple applications in optical metrology and psychophysics.