LIDTCW laser

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

This is needed for the manufacturer of the eyeglasses to know where to place the optical center on each lens, so you can see well with the glasses.

Edmund Optics Gaussian beam Calculator

In the ultrafast regime, challenges include managing nonlinear effects, which can lead to damage in optical components due to high peak powers concentrated at ultra-short durations. While managing catastrophic damage is crucial for ultrafast laser optics, the color-change effect is also an arch-enemy and a LIDT-limiting factor, which has to be eliminated in order to increase the lifetime of optics and reduce the total cost of ownership. This regime is what OPTOMAN thrives on. Read more about how OPTOMAN solves the color-change problem here.

If you don't know how to choose the Refractive Index,you can refer to these informations,and you can get the most comfortable prescription glasses.

Gaussian beam propagator

Each row of an Rx has three main sections: Sphere (SPH), Cylinder (CYL), and AXIS. The SPH section corrects nearsighted or farsighted vision. The CYL and AXIS sections correct  an astigmatism.

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

LIDTlaser

A full list of the countries where we ship glasses is available on the Payment Page. For more info you can check out our Shipping Information page

Brand New and High quality, See the difference with Cyxus Polarized Sunglasses.Wear polarized sunglasses to see the test card, you will see the hidden colorful pattern. This is the most convenient and fast way to judge whether the polarized sunglasses are authentic or not. Take it and found the real polarizer for you.

The thickness of the lens is related to the refractive index. The higher the refractive index, the thinner the lens. You can choose the lens that is more suitable for you according to your own habits and preferences.

If your Sphere (SPH) is ‘+’,you are farsighted,please tell us that after you put on the glasses, do you see further clearly or see near clearly compared with not  wearing glasses.

LIDTtesting

PD stands for Pupillary Distance, which is the measurement from the center of one pupil to the center of the other. Your PD is an important factor and tells you where you look through the lens of your glasses and should be as accurate as possible. For people with strong prescription, this is especially important. You can normally find your PD on your prescription. Generally speaking, the PD numbers for adults stays the same. The average PD range for adults is 57-72 mm and for kids is about 43-58 mm.

High laser-induced damage threshold (LIDT) is a buzzword when talking about laser optics. Laser damage is a complex phenomenon and, while the result is the same – the optical component is ruined and not suitable for further use, there are different laser damage types and mechanisms. OPTOMAN takes innovation very seriously and makes sure that optical components are able to resist the ongoing increase of laser power and decrease in pulse duration, thus high LIDT is OPTOMAN‘s bread and butter.

Laser damage Threshold calculator

Although peak powers produced by nanosecond lasers are not so significant (at least for OPTOMAN), coating damage is still a common concern in this regime. Laser optics must be manufactured with utmost precision to be applicable in nanosecond laser applications.

The Picosecond regime is the transitional interval of the pulse duration where nonlinear effects are still not significant. Thermal effects caused by high repetition rates of picosecond lasers are a serious concern, potentially resulting in heating and consequently damage to optical components. Moreover, when the pulse duration is less than 10 ps, nonlinear effects become relevant and the color mode of damage is dominant.

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

Managing average power levels and thermal effects is crucial in this regime. Continuous exposure to high power densities can lead to thermal lensing, optical coatings degradation, and other forms of damage over time.

There may also be a fourth section on the Rx , NV-ADD (for Near Vision-Reading ADDition), which could be used to order a pair of bifocal or progressive glasses with a close-up   vision section in the bottom part of the lens.