Speckle reduction in laser-illuminated picoprojectors

نویسنده

  • Fergal P. Shevlin
چکیده

Speckle can seriously degrade image quality in laser-illuminated projection displays. Various solutions appropriate to small microdisplay-based projectors are presented. Illumination optical system and projection optical system design are discussed in order to better understand the critical constraints of size, power consumption, optical efficiency, and performance. DYOPTYKA’s innovative solution, using a phase randomizing deformable mirror, is described.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Laser Speckle Reduction based on electroactive polymers

Optotune has developed an Electroactive Polymer Actuator-based solution to move a diffuser and drastically reduce the speckle contrast of Laser beams: the LSR-5-17 (Laser Speckle Reducer). With its integrated miniaturized electronics for HV generation and motion control, the LSR-5-17 provides a compact 27 x 21 x 6mm solution with a simple 5V micro USB interface for power supply. A miniaturized ...

متن کامل

Laser speckle contrast imaging for measuring blood flow

When a diffuse object is illuminated with laser light, a random interference effect known as a speckle pattern is produced. If there is movement in the object, the speckles fluctuate in intensity. These fluctuations can be used to provide information about the movement. A simple way of accessing this information is to image the speckle pattern the fluctuations cause a blurring of the speckle, l...

متن کامل

Trans-illuminated laser speckle imaging of collateral artery blood flow in ischemic mouse hindlimb.

The mouse ischemic hindlimb model is used widely for studying collateral artery growth (i.e., arteriogenesis) in response to increased shear stress. Nonetheless, precise measurements of regional shear stress changes along individual collateral arteries are lacking. Our goal is to develop and verify trans-illumination laser speckle flowmetry (LSF) for this purpose. Studies of defibrinated bovine...

متن کامل

Image synthesis from nonimaged laser-speckle patterns.

We demonstrate that unspeckled images of coherently illuminated, diffuse objects can be formed from measurements of backscattered laser-speckle intensity. The theoretical basis for this imaging technique is outlined, and results of computer experiments that successfully construct images from digitally simulated laser-speckle measurements are presented.

متن کامل

Displacement Measurement Using Speckle Correlation with Reduced Number of Database Patterns

INTRODUCTION Speckle patterns are complex intensity distributions, which occur when an optically rough surface is illuminated with a coherent light. Scattered light waves from illuminated points of the surface, interfere and create the speckle pattern. This phenomenon was known to be troublesome when the laser was first introduced, but later it was discovered to be an opportunity for various me...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2012