Circular aperture diffraction effects limit the resolvingpowerof telescopes and microscopes. This is one of the reasons why the best astronomical telescopes have large-diameter mirrors; in addition to the obvious advantage of an increased light-gathering capability, larger mirrors decrease the resolvable ...
Lasers, LEDs and light sources are devices that create light. LEDs (light emitting diodes) convert an electrical current into light using spontaneous emission in optically active semiconductors. Lasers add a mechanism for optical feedback, such as mirrors, that stimulates further emission and generates...
While there is clear evidence that simple optical instruments such as plane and curvedmirrorsand convexlenseswere used by a number of early civilizations,ancient Greekphilosophers are generally credited with the first formal speculations about the nature of light. Theconceptualhurdle of distinguishing the...
Deformable mirrors are essential dynamic wavefront compensation. Among the various types of deformable mirrors with different actuation mechanisms, the unimorph piezoelectric deformable mirror (UPDM) offers distinct advantages owing to its compact size and low cost. The two most critical challenges in UPDM...
If the ends of the nanowire are cleaved (Figure 2.14b), they can function as two reflecting mirrors that provide optical feedback and define a Fabry–Perot optical cavity with modes m(λ/2n1=L), where m is an integer and L is the length of the cavity. A photoluminescence image of ...
Read the full-text online article and more details about Students See the Light Museum's Rainbows, Mirrors Turn Physics into Fun.doi:http://dx.doi.org/Guarino, MarkVutreshni Bolesti
- 《Applied Physics Letters》 被引量: 51发表: 2005年 Asymmetric Bragg mirrors for the reduction of emission wavelength dependence on the viewing angle in organic microcavity light emitting diodes D. Rakic, "Asymmetric Bragg mirrors for the reduction of emission wavelength dependence on the viewing ...
For human researchers, it takes many years of work to discover new super-resolution microscopy techniques. The number of possible optical configurations of a microscope—for example, where to place mirrors or lenses—is ... Optics & Photonics ...
The distances between the mirrors and the lens are \(l_{1}\) and \(l_{2}\), as represented in Eq. (9), where detunings \(\Delta l_{1}\) and \(\Delta l_{2}\) are required for stable operation of the OPO22. Full size image...
Technology in the classroom : student understanding of image formation by converging and diverging lenses and mirrors : ray tracing v. computer simulation As technology has become a larger influence in education, governments and school administrators have increased their calls for utilization of computer...