Spectrum Optical Sources has been crafting neutral density step filters and circular variable ND coatings for over twenty years. Creating and supplying circular and linear variable ND filters, circular and linear stepped ND filters and ND filter sets for the four major companies in the industry that offer these optical components in each of their catalogs.

Spectrum Optical Sources, Inc. has BK7 substrates to coat an ND filter to your specification or choose one of the filters Spectrum Optical Sources, Inc. has in stock for next day shipping.

Office Address:

Spectrum Optical Sources
470 Schooleys Mtn. Road #265
Hackettstown, NJ 07840 USA

I had never heard of a Himalayan Salt Lamp before nor did I know of the powerful health benefits Himalayan Salt Lamps provide until I went to a website to learn more.

The Himalayan Salt Lamp is a unique lamp that sucks out negative ions from the air. Negative ions can build up from smoke, chemical odors, carbon monoxide, bacteria, viruses, mold, etc.  The Himalayan Salt Lamp will reduce these negative ions in your indoor air.  This can help those with allergies, headaches, asthma and infections.
First discovered in the 1950’s in Poland, it was noted that salt miners rarely suffered from tuberculosis.  This then lead to the discover of numerous additional benefits of himalayan salt.  In addition, an underground Ukraine hospital, situated next to a Himalayan Slat Mine reported a 90% reduction in patients with asthma.  This was attributed to the benefits of being in close proximity to the Himalayan salt mine.
Himalayan Salt is good for the body too. You can add some Himalayan salt to your bath, or add it to your food.  The benefits include better skin reducing acne, itching, and other skin ailments.

To learn more about the benefits of himalayan salt lamps.