Fluorescence Microscopy

When using a fluorescence microscope, chemicals that emit fluorescence are combined with the light microscope’s magnification abilities. A high-intensity light source is used in fluorescence microscopy to excite a fluorophore, a fluorescent molecule, in the sample being examined.

Bandpass, shortpass, and longpass emission filters, as well as dichroic beamsplitters, are all included in the fluorescence filter sets that GF Tech offers. A range of wavelengths are selected to match the excitation and cut-off wavelengths of the fluorescent dye. Standard substrates are covered with all-dielectric low absorbing hard coatings to create a quick transition between high transmission and deep blocking down to OD5 or OD6. The high transmission of pass band, steef slope and precise cut off of excitation filter and precise cut on of emission filter ensure high quality images in terms of sharpness, contrast and brightness.

Heat Protection Filter Medical Lighting

In the process of illumination, certain amount of heat is also dissipated, which harmful radiation is also within the dissipation.

Therefore, heat protection filter is critical in illumination devices. These filters combine an extremely high transmission in the visible region with a sharp transmission to impede transition in the IR band.

GF Tech offers a variety of harmful radiation blocking filters.

Laser Blocking Filters

There is an elevated risk to the eyes because of the special properties of laser radiation (such as coherent, collimated, and monochromatic). It is necessary to employ specific optical filters that transmit “regular” light while blocking laser light.

Protective filters that match the wavelength and power of the individual laser radiation source are required because laser light has a defined wavelength that depends on the laser active medium that emits light.

Produced by GF Tech, laser blocking filters place an emphasis on safety and adherence to international standards and specifications.

Laser Safety Filters for Ophthalmologic Surgery

Almost all medical procedures use laser technology. Ophthalmology, in particular, has placed a strong emphasis on the use of lasers because of the eye’s naturally transparent nature and focused characteristics as an optical device.

To safeguard the surgeon’s eye while displaying a high transmittance for the backdrop image of the patient’s eye, it is crucial to have laser safety filters that block therapeutic lasers with high optical densities.

Raman Spectroscopy

Raman spectroscopy is a non-destructive method of chemical examination that offers thorough details on crystallinity, chemical structure, phase and polymorphy, and molecular interactions. It is based on how light interacts with chemical interactions in a substance.

Only specialised Raman Filters can make this technology a reality.

These filters selectively block the laser line while allowing Raman scattered light to reach the spectrometer. High transmission, efficient laser blocking down to OD5 and OD6, efficient pass-block transitions with an FWHM of 1.5 nm, and effective laser blocking down to OD5 and OD6 are additional requirements for these filters.

Customized Glass Substrates for Biochip Applications

Biochips are designed substrates (also known as “miniaturised laboratories”) used in molecular biology that may support several simultaneous biochemical operations. The biochip is being utilised in research on proteins, toxicology, and biochemistry. In order to take preventative action, biochips can also be used to quickly identify chemical weapons employed in biological warfare.

Glass substrates production are critical for biochip manufacturing. It requires specialised optical coating and technologies.

Endoscope Fluorescence Detection

A novel technology called fluorescence endoscopy improves the ability to detect malignant or premalignant lesions that are difficult to detect or that are not readily visible.

This endoscope has a small inbuilt optical filter that only lets the desired fluorescence from the sample reach the detector while obstructing unwelcome traces of excitation light.


Endoscopy is the process of looking inside body cavities, joints, or organs using an endoscope. It provides lighting and visuals of the inside of a joint using fibre optics and strong lens systems.

Deflection mirrors are also used on prisms, apertures, and occasionally even filters to improve endoscopes for various uses and broaden the field of view.

Flow Cells

Liquid samples can be constantly pumped via the beam path using flow cells, which are sample cells. For samples that the light source might harm, this is helpful. In order to prevent the damage from interfering with the signal, fresh samples are regularly replaced.

Optical coatings, such as fluorescence filters, grating structures, or bio-functional coatings, can further modify surfaces on the inside and outside.

Flow cells are excellent tools for targeted corrosion monitoring, failure cause analysis, and performance-based chemical treatment optimization and control.