Industrial Fiber Optics' CT Series of lasers are the most popular line of lasers used in middle and high schools in the United States. Designed for education, and featuring a bright blue transparent enclosure, their attractive looks invite students to participate and explore in optical and laser technology while seeing the laser's internal "working" components. With a complete set of features and long warranty, it is a product that is hard to surpass.

The IF HN35 is Industrial Fiber Optics' lowest CDRH Class IIIa helium-neon laser. It has a nominal output power of 3.5 mW of highly collimated beam of 632.8 red laser light. Typical applications of this laser is in large optical demonstrations, experiments where the laser beam requires spatial filtering which causes significant losses, or holography.

The CT Series lasers were designed for use in education. They are not an engineering product or design being sold for educational purposes. From the initial concept everything about the attractive, safe design was to interest students in technology. It includes safety features such as 110 VAC to low voltage power adapters, tamper-resistant screws, impact resistant acrylic enclosure, easily locatable bright red laser shutter, bright and very durable nickel-plated laser aperture, industry standard electrical connections and tripod mount.