Tuesday 13 March 2018

Laser Protection Eyewear (Goggles) for Holmium Laser Surgery

The new PROTECT HM-0281 series Laser goggles are lightweight laser protection eyewear made from special plastics; they are a perfect solution to wear over prescription glasses and the design offers a large field of vision. The temples can be adjusted individually in length and angle and the soft rubberized face foam provides the wearer with enhanced comfort.

The Laser Safety Filter type: BV0281 is suitable in particular for Holmium, Erbium and CO2 lasers used in medical surgery, but covers additional wavelength as well. The laser safety filter consists of a light grey coloured polycarbonate lens, and offers visible light transmission (VLT) of more than 56%. The laser safety filter is CE certified in accordance with the requirements of EN207.

Visit our Web shop to purchase this: HM-0281 PROTECT Holmium Laser eyewear (web store)

Filter details:

·       Special plastic Protection filter 0281
·       Filter colour:                                       Light Grey
·       Visible Light Transmission (VLT):       56%
·       180 - 315nm                                       D LB10 + IR LB5
·       315 – 370nm                                       DIR LB6
·       1900 – 11000nm                                 DI LB4 + R LB3Y







Visit our Web shop to purchase this: HM-0281 PROTECT Holmium Laser eyewear (web store)


For more information and detailed quote please contact us at: info@brinellvision.com


STLaserstrike, Pilots Laser Strike Protection Glasses

ST Laserstrike, Advanced Laser Attack Protection Technology for the Pilot.


                                                                                                                                                        stlaserstrike.com   


      


Aviation safety with Green laser technology


Pilots view on landing when a green 532nm laser is shone into the cockpit.

Green LASER lights which can blind pilots have been fired at planes landing at Airports leading to some pilots having to cover their eyes and others taking evasive action. On each occasion, a powerful laser pen – which can focus a green beam of light at 532nm over several miles – has been used. The devices, which can cost more than £100 and are generally used by astronomers and scientists, have now become dangerous toys.

A cargo plane from Aberdeen was forced to drop 400ft as it approached the runway to avoid a green beam. An easyJet Airbus carrying 59 passengers and six crew travelling on the same flightpath from Stansted was targeted 30 minutes later. Both pilots were dazzled by the beam, suffering a temporary loss of vision, and were forced to cover their eyes at a crucial point in the descent. 
In March this year two adults were arrested in March after a laser was aimed at a commercial plane near Midway Airport in Chicago. A police helicopter sent to investigate was also illuminated.





Sudden exposure to laser radiation during a critical phase of flight, such as on approach to landing or departure can distract or disorient a pilot and cause temporary visual impairment. Permanent ocular damage is unlikely since the laser source is generally reduced in intensity due to scattering and absorption over the long distances in the atmosphere. In addition the the eye’s blink response could further limit exposure.

However flight simulator studies have shown that adverse visual effects from laser exposure are especially debilitating when the eyes are adapted to the low-light level of a cockpit at night. Recovery of visual performance after exposure to laser light may take from a few seconds to several minutes. This effect could be even worse for example when the glass canopy of a Helicopter is illuminated by green laser. Apart from the obvious distraction of such a flash, the three most commonly reported physiological effects associated with green laser exposures are:

Glare
Visual blocking of an object in a person’s field of vision due to a bright light source located near the same line of sight.

Flashblindness
Temporary loss of vision after the source of illumination has been removed.

Afterimage
A transient image left in the visual field after an exposure to a bright light.

Laser protection filters for infrared laser applications are relatively easy to design because the wavelengths emitted by such lasers are outside of the visible spectrum. The 532nm wavelength emitted by green lasers, however is in the centre and most sensitive part of the human Photopic region making filter design more of a challenge.

ST Laserstrike has developed a laser safety filter technology using a combination of advanced plastics and precision thin film technology which allows the user to see a completely balanced colour view while totally blocking the laser at the required wavelengths. In addition the technology provides outstanding visible light  transmission when compared with other types of multi colour laser blocking technologies.Other types of blue & green laser filters use absorbing materials only which generally remove all the blue and a signifcant amount of green from the visible spectrum. This makes the eyewear completely unsuitable for flying or in fact operating any piece of important equipment.

ST Laserstrike eyewear is manufactured at our high-tech UK manufacturing facility using the latest in RX prescription lens production techniques and advanced coating technology to create outstanding bespoke pilots laser protection glasses.









High blocking levels for 532nm.








Brinell CN-Green Colour optimisation for neutral transmission





If you are interested in purchasing Pilot's Laser Strike Glasses you can find more information from: ST Laserstrike Eyewear shop




For more information about advanced laser protection solutions contact us  

http://www.stlaserstrike.com/




Thursday 16 March 2017

Advanced Lightweight Laser Protection eyewear for Medical Lasers

Laser eyewear using dyed Plastic lenses have by far become the most popular format over the last 20 years. The main driver has of course been cost however laser filters based on plastic lenses also have other advantageous features such as low weight and good resilience in case they are dropped from the surgical bed! The downside is the transmission properties are quite often not desirable due to the broad-band absorption nature of the dyes used which introduce colour and also provide lower power handling capabilities. Traditional glass filter lenses such as Schott & Hoya filter glasses still have the upper-hand on the basis of general colour balance, transmission and power handling especially for standard IR laser used in surgery such as Nd:YAG (1064nm) and Holmium (2100nm). They also have an advantage in that they can be coated with optical thin- film stacks to increase laser power handling or wavelength coverage. 


Glass filters make eyewear heavy and cumbersome for long medical procedures

For doctors operating lasers for critical applications such as tissue ablation, incision and coagulation consideration should be given to optical performance such as lens clarity, light transmission and colour balance. Glass filters are generally chosen for these critical applications however they can often make eyewear heavy and cumbersome especially in the case of a long medical procedure.

The ideal solution to this issue is to provide laser coatings onto plastic lenses, this can provide lower weight filters along with higher optical performance in terms of transmission and colour balance. Another important advantage of laser coated lenses is that they can be supplied with a prescription so that the user no longer has to wear over-glasses on top of their own prescription glasses. This reduces problems with ghost images from multiple internal reflections and lens aberrations and so improves visual clarity during these critical operations. However depositing thin, hard dielectric layers onto plastic lenses has always been a challenge and it is only in the last 10-15 years that standard AR coating for Ophthalmic lenses has become reliable on most plastics. Most Ophthalmic coatings use 6-8 thin-film layers to create the anti-reflection (AR) properties on the other hand laser blocking coatings often need in excess of 50-60 layers deposited to nanometre accuracy. There is a limit in processing temperatures used during coating due to the plastic substrate and so these large thin film stacks can be soft and have low laser damage thresholds without use of more advanced coating technology such as Ion Assisted Deposition or Plasma Ion Assisted Deposition.


Fig 1. A high powered Argon/Oxygen plasma source on left hand side and electron beam evaporation of metals on the right hand side. The pure materials are evaporated into a carefully controlled oxygen plasma before depositing on the lens surface as dielectric layers with nanometre accuracy.



There are a small number of products utilising coated plastics for Laser protection available generally in specialist medical areas such as Nd:YAG and Holmium laser surgery. However currently there is a limit to the number of layers which can be deposited and subsequently the performance in terms of power handling and laser blocking (Optical Density) due to the large levels of stress incorporated into the films during processing. Without careful management of materials and intrinsic film stress these types of coatings will always be prone to failure in standard use.



Fig 2. A coated plastic lens from Laser protection eyewear for Holmium medical lasers used in Urological surgery after standard post-surgical cleaning. Intrinsic stress within the deposited layer stacks causes complete coating failure with the introduction of just a small surface defect.

 Advanced Plastic Laser Protection Lens technology

Brinell Vision has developed a laser coated plastic lens which surpasses standard thermal shock, abrasion tests and long term environmental exposure. The solution has been made by stripping all the production steps right back down from selection of the plastic pellets used in the lens molding process, advanced lens surface treatments to development of the proprietary coating materials and deposition method.


The Brinell Laser lens is molded and treated using a blend of specifically chosen materials to provide the capability to accept large stacks of dense dielectric thin films. Core to the deposition technology is the high energy plasma and custom designed advanced computer controlled tooling system which allows us to deposit the optical layers onto curved surfaces with nanometre accuracy. The deposition parameters have been optimised for limiting stress while effectively hardening the surface of the plastic. It is now possible to create plastic lenses with narrow notch filters in the visible for blue and green lasers using over 100 individual optical layers to create deep blocking capabilities. This development is a significant move forward in eyewear for medical laser surgery as the product combines the advantage of low weight plastic with the optical properties of high grade glass laser filters.



Fig 3. Shows Brinell Vision custom designed prescription eyewear for blocking green and NIR lasers. The base6 curved lens substrates are coated with over 100 individual dielectric thin films to provide maximum visible transmission and high levels of blocking for green (532nm) and NIR (1064 & 2100nm).

For more information contact:
info@brinellvision.com

www.brinellvision.com


Monday 7 September 2015

Laser Protection glasses for Excimer, UV, harmonic Nd:YAG (266nm-355nm-532nm-1064nm), KTP, Ti:Sa, Diodes, Disc, Nd:YAG

Brinell Vision Convex 0166

Purchase directly from Brinell Vision UK: BrinellVision.EU Internet Shop


Is it possible to block laser and see it at the same time? With Brinell Vision Convex 166 you can.

The new Convex 0166 is able to completely block 473 and 532nm lasers but lets you see the laser position using fluorescence emitted from the special absorption dye.

Blocking is up to LB5 for 473nm and 532nm however the new product provides an excellent alignment function.  The new glasses are suitable for Excimer, UV, harmonic Nd:YAG (266nm-355nm-532nm-1064nm), KTP, Ti:Sa, Diodes, Disc, Nd:YAG. 




Features

  • Application:UV, Argon, KTP, Nd:YAG harmonic
  • Material:Special plastics
  • Filter colour:amber
  • Visible Light Transmission. 22%
  • Very large field of vision by curved lenses
  • Sporty look
  • Low weight
  • Narrow covering on upper edge and sides
  • Side arm length and inclination are easily adjusted to fit each user
  • Also available with RX-clipin
  • Available with selected filters

Purchase directly from Brinell Vision UK: BrinellVision.EU Internet Shop

or contact us: info@brinellvision.com
brinellvision.com

Sunday 10 May 2015

Brinell Vision - Laser Safety Protection Eyewear for Medical Lasers





Lasers are devices that produce monochromatic light which is directional and coherent. These special characteristics are utilised in designing laser devices that are used in industry and in medical applications. Industry uses lasers to cut, weld, drill, mark and fuse material.

Medical lasers
The growth of the use of laser for medical applications in areas such as, surgery, dermatology, gynaecology, cardiology, otology, ophthalmology, etc has lead to a significant increase in the number of people being exposed to laser hazards. These hazards not only include exposure to the primary beam but also to secondary reflections and scattered light. Some of the major categories include:

· Unanticipated eye exposure during alignment
· Misaligned optics and upwardly directed beams
· Available eye protection not used or incorrect eye protection used
· Equipment malfunction
· Intentional exposure of unprotected personnel
· Operators unfamiliar with laser equipment
· Lack of protection for ancillary hazards

Brinell Vision supplies an extensive range of laser safety products for all types of laser applications, e.g. industrial, medical and customised solutions for R&D. We only supply laser safety products which comply with the latest European laser safety legislation. Our eyewear is designed and manufactured to provide users with excellent visible light transmission by use of a combination of advanced thin film technology and filter glass. Brinell vision products and designs are used in the most demanding medical and industrial applications throughout Europe.  We provide an extensive range of laser eye protection and laser protection equipment including screens and curtains. In addition we can advise on the correct levels of protection and are able to design specific laser protection filters  for your particular application. 

Visit our online shop at: brinellvision.eu

or contact us: info@brinellvision.com


http://www.brinellvision.com/