Tunablelaser

We are located in a beautiful 2,500 square-foot state of the art facility in Warminster, PA (about 25 miles north of Philadelphia). We are proud to use premium laser marking systems from Coherent-Rofin and TRUMPF. Our lasers are extremely high precision (accurate to <0.001”), low maintenance and incredibly robust. They are also highly configurable, allowing us to laser mark and engrave high quantities of smaller to midsize items through array fixturing in addition to a wide variety of large and uniquely shaped items that most other laser systems are incapable of accommodating. We also have rotary chuck capability for the processing of cylindrical components. For the utmost in precision evaluation and measuring accuracy, we employ a RAM Optical measuring comparator.”

With over 15 years of experience, we pride ourselves in efficient handling of our customer’s specifications regardless of the application. From stringent medical and military regulations to creatively delicate artwork, you can count on us to provide the utmost in customer service and satisfaction in everything that your project requires. Standard lead time for orders is 7-10 business days, but quite often we are able to process orders in as little as 2-3 business days. We also offer order expediting at an additional fee. Please feel free to contact us with any questions related to order processing or scheduling.

Thorlabs

When coupled with Wallman’s hypothesis that retinal activity caused by image contrast inhibits eye growth, these results provide a testable hypothesis to account for myopia progression. For example, we suggest that hyperopic blur is a risk factor for myopia progression only when the eye has a negative SA because that is the combination leading to relatively low contrast in the defocused retinal image. Because the likelihood of a negative SA increases with accommodation, avoiding long hours of near work in the presence of accommodative lag may help prevent the onset and progression of myopia.

Retinal image contrast, as measured by the area under the visually weighted modulation-transfer function, depends on both the magnitude and the sign of defocus relative to the sign of the SA. Image contrast is greater for hyperopic blur than for myopic blur when SA is positive and vice versa when SA is negative.

Single-frequencylaser

Diodelaser

Indiana University School of Optometry, Bloomington, Indiana (LNT, AB, TL); and Laboratorio Interuniversitario de Investigación en Visión y Optometría, Universidad de Murcia, Murcia, Spain.

Larry N. Thibos School of Optometry Indiana University 800 E. Atwater Ave Bloomington, IN 47405 e-mail: [email protected]

Visual sensing of the sign of defocus is important not only for the rapid control of accommodation but also for regulating the slower long-term growth of the eye.

Our goal is to deliver high quality laser marking and engraving for a variety of applications within the medical, military and aerospace industries in addition to numerous other fields under the manufacturing umbrella.

We examined the possibility that ocular spherical aberration (SA) elicits a sign of defocus by optical modeling of image formation using the principles of physical optics.