If you are a Hackaday reader, you probably know what a Fresnel lens is. You find them in everything from overhead projectors to VR headsets. While it seems commonplace now, the Fresnel lens was an ...

Making a traditional glass lens requires a lot of experience, skill, and patience grinding a piece of glass to the required shape, and is not for the casual experimenter. Making a glass Fresnel ...

Fresnel lenses are specialized optical components with grooved surfaces instead of traditional curved ones. Owing to their unique design, Fresnel lenses are thin and lightweight, typically have short ...

According to Tybee Island Historical Society Director Sarah Jones, part of the original 1867 first order Fresnel lens that had been previously cracked years ago, fell and shattered over the weekend.

Cylindrical lenses are commonly used to change an image's aspect ratio or shape a laser beam. Fresnel lenses consist of thin, lightweight plastic sheets marked with a series of concentric grooves.

you’ll need to know how to clean a TV screen safely. This is especially true if you have young children or energetic pets running around, leaving behind smears and spots. Even if you own one of ...

The Quest 3S shares some hardware components with the Quest 3, but it also features a few notable downgrades. Like the Quest 3, it is powered ...

But it does not support Dolby Vision HDR. This OLED TV is an excellent choice, especially if you want Dolby Vision HDR or a screen size smaller than 55 inches. But it’s not as bright or colorful ...

This new feature can be accessed through the Google app or from the dedicated Lens app in the Play Store. Pixel users can ...

Meta unveiled the Quest 3S at its September 25 Meta Connect event. There are two Meta Quest 3S models, and the only ...

Although there are many possible refresh rates, most TVs come with either a 60 Hz refresh rate (meaning 60 screen refreshes per second) or a 120 Hz refresh rate (120 screen refreshes per second).

I’ve been PCMag’s home entertainment expert for over 10 years, covering both TVs and everything you might want to connect to them. I’ve reviewed more than a thousand different consumer ...