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If you're outside of Ohio, you can go ahead and order now without being taxed. Then, go ahead and email us your certificate so we can mark your account. If we expand in the future, we may eventually charge taxes in your state.

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A sturdy, reliable Class IIIA (now Class 3R) <5mW Red Laser Pointer for the classroom or boardroom! Comes with a plastic and foam case for secure storage. This is the most visible red laser pointer you can legally own, so it's great for classroom demonstrations.

My old one I used when I taught gave up the ghost after 15 years. I have since retired from teaching, but the cat loves chasing the red dot. She gets tired before we do.

We offer discounts on most products for orders of more than 10 of any one item. Another price decrease is available at 25 pieces - typically what's needed for a classroom. If you are interested in those quantities, please email us and include your item and quantity details for a quote.

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A report issued by NIST (the National Institute of Standards and Technology) found that 90% of the green laser pointers on the market tested out of compliance with FDA Safety Regulations.

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Class IIIA laser pointers (<5 mW rating) should normally be handled by adults. They can damage a person's retina if pointed directly at the eye for many seconds to minutes, but our natural "look away" reflex usually prevents any damage by keeping exposure short.

To achieve optimal magnification and clarity, the objective lens and ocular lens must work in harmony. The process begins with the objective lens capturing light from the specimen, forming an intermediate image. This image is then further magnified by the ocular lens, delivering a detailed and enlarged view to the observer.

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Understanding the numerical aperture of the objective lens is crucial, as it determines factors such as resolution and depth of field. The ocular lens complements this by providing additional magnification, allowing for intricate examination and analysis.

We recommend our LaserBlox, which are specially designed for classroom demonstrations and experiments. They won't roll, can be stuck on a white board, and can be stacked magnetically for ray experiments.

When it comes to optical instruments like microscopes and telescopes, the objective lens and ocular lens play distinct roles in shaping our viewing experience. Understanding the differences between these crucial components is fundamental to unlocking the full potential of these devices.

Conversely, the ocular lens, also known as the eyepiece, is situated near the observer's eye. Its primary function is to further magnify the image produced by the objective lens. Ocular lenses are often interchangeable, allowing users to customize their viewing experience based on desired magnification. The most common magnification for a microscope ocular lens is 10x. Additional magnifications of microscope ocular lenses include 12.5x, 15x, and 20x.

Every delivery’s carbon footprint is calculated based on weight, shipping method, and distance traveled. We neutralize these emissions by purchasing verified carbon removal credits from groundbreaking projects.

The objective lens and ocular lens are indispensable components in optical instruments, each contributing uniquely to the observation process. Recognizing their differences and understanding how they collaborate enhances our ability to explore the microscopic world with precision and clarity.

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With your purchase, you’ll join a community of proactive merchants and customers dedicated to a sustainable future. Together, we've removed emissions for over 45 million deliveries and removed over 31 thousand tonnes of carbon.

We only automatically charge tax to shipping addresses in Ohio. If you're in Ohio, please email us your tax exempt certificate with purchasing email you'll use. We will keep it on file and mark your purchasing email as tax exempt. Then you can place your order normally without being charged taxes.

Green is the most visible, red is the safest around kids, and violet lets you experiment with fluorescent materials. They each have their use, so consider getting one of each!

The objective lens is the primary magnifying element in optical instruments. Positioned closer to the object being observed, it captures and magnifies the incoming light, bringing the specimen into focus. The objective lens is characterized by its varying magnification levels and includes the numerical aperture of the objective.

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Our Class II (<1 mW) laser pointers (our "Super Safe" line) are preferred by schools and teachers, especially when kids will be handling them. These are considered safe by the FDA as long as they are not pointed directly in the retina for prolonged periods of time.

We can add custom engraving of your brand or name to any of our laser pointers with a minimum order of 50 pieces. Contact us here for more information.

We'll need to set up a custom order for you and mark it for payment due later. Please email us to receive a quote that includes shipping and taxes. Then, email us your PO. After shipping, we'll email you the invoice with payment details. Please note that if we do not have an existing relationship with your institution, we may require payment before shipping to reduce our risk of fraudulent orders.

Classic pen-size red laser pointer Output power: <5mW Class IIIA laser Wavelength: 630nm-680nm Dimensions: 5 1/2″ X 3/8″ dia. Batteries: 2 AAA Reusable plastic case