# Small and simple: next-generation miniaturized diffraction-based spectrometer with computational reconstruction algorithms

## TL;DR

A new miniaturized spectrometer uses a simple pinhole and computational algorithms to reconstruct spectra efficiently and inexpensively.

## Contribution

The novel use of arbitrary pinhole shapes and computational algorithms eliminates complex calibration in spectrometers.

## Key findings

- The spectrometer achieves fast acquisition with minimal loss in spectral resolution.
- It enables cost-effective on-chip spectrometers through computational reconstruction.
- The design simplifies manufacturing and avoids traditional calibration procedures.

## Abstract

An ultra-simple and miniaturized spectrometer using an arbitrarily shaped pinhole as diffraction element reconstructs a broadband spectrum from the information of diffraction of monochromatic radiation by clever computational reconstruction algorithms. This circumvents complex calibration procedures and paves the way to cost-effective on-chip spectrometers combining fast acquisition without significant loss in spectral resolution.