Abstract

In this paper, we propose an adjustable aperture based on the phase modulation of a spatial light modulator (SLM). Two polarized beam splitters (PBSs) are used to control the polarized light and one SLM is used to modulate the phase of the polarized light. A specific grayscale is produced, where the middle grayscale is with phase of 0 and the other is with phase of $\pi$ . When the light passes through the first PBS and the SLM, the polarized state of p-light is changed to s-light by the grayscale with phase of $\pi$ , so only middle light can pass through the second PBS and is detected by the camera. By controlling the size of the middle grayscale with phase of 0, the device can realize the function of adjustable aperture. Our experiment shows that the aperture can be tuned between 0 and full size, meaning that it can reach the fully open and closed state. The results verify its feasibility. The adjustable aperture has wide applications in imaging system, fiber-optic communication, and photonic signal processing.

© 2015 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription