Ultra-compact Fourier transform imaging spectrometer using a focal plane birefringent interferometer

Area of Science:

• Optics and Photonics
• Spectroscopy
• Interferometry

Background:

• Fourier transform spectroscopy is a powerful technique for spectral analysis.
• Traditional Fourier transform spectrometers can be bulky and heavy.
• The need for compact and lightweight spectral imaging systems is growing for field applications.

Purpose of the Study:

• To introduce a new Fourier transform imaging spectrometer based on a focal plane birefringent interferometer (FPBI).
• To investigate the principle of interferometric imaging using the FPBI.
• To demonstrate the feasibility and advantages of the FPBI for spectral imaging.

Main Methods:

• Development of a focal plane birefringent interferometer (FPBI) consisting of a birefringent plate and wedge.
• Utilizing the FPBI to split ordinary and extraordinary rays, causing interference on the focal plane.
• Acquiring spectral images through scene scanning and spectral recovery.

Main Results:

• The FPBI successfully performs spectral imaging measurements.
• Experimental verification confirms the effectiveness of the FPBI.
• The FPBI system is demonstrated to be ultra-compact and lightweight.

Conclusions:

• The developed FPBI is an effective solution for spectral imaging.
• The compact and lightweight nature of the FPBI makes it suitable for outdoor surveillance.
• The FPBI system is well-suited for airborne remote sensing applications.