PRODUCTS

Recently, flat prisms with finely ruled light guide panels are widely used in LCD backlight panels, and Fresnel lenses are increasingly employed for magnification or collector lens applications. Customized waveguides are also used for AR/VR/MR applications.

Large-scale transmission and reflective screens, with dimensions up to 200 inches, depend on our sophisticated Fresnel or lenticular lenses for their superior performance.

Standard Products

Fresnel Lens

About Fresnel lenses

Fresnel lenses, though virtually flat, can act as spherical lenses. Fresnel lenses offer tremendous space and weight saving capabilities, and also enable focal lengths shorter than their aperture, a feat impossible with spherical lenses.

Fresnel lenses are widely used for camera field lenses, OHP condenser lenses, and rear projection screens.

NTKJ manufactures and sells not only off-the-shelf Fresnel lenses, but also manufactures custom-made Fresnel lens products according to our customers’ exact size and design requirements. Please contact us for more details.

For Fresnel lenses, we carry two ‘types,’ “A” and “B”.

The following explains the difference between ‘A’ and ‘B’ type lenses:

– Fresnel (‘A’ type):
The diffused light from the point light source existing at the focal length position is incident on the lens plane and emits parallel light from the Fresnel side.

– Solar concentrator Fresnel (‘B’ type):
Collimated light is incident from the lens plane side and is converged to the focal point on the Fresnel side.

Below catalog is for ‘A’ type lenses.

Solar Concentrator Fresnel Lens /


Solar Concentrator


Fresnel Lens /


Sensor Fresnel Lens

About solar concentrator Fresnel lenses and Frenel lenses for sensors

Solar concentrator Fresnel lenses were originally developed for concentrating photovoltaic (CPV) application. The solar concentrator Fresnel lenses are designed with the plano side to face the sun (parallel light source), and the Fresnel surface to face photovoltaic cells (focus). These lenses are also used as a solar energy concentrator for solar furnaces.

This configuration is designed to collect parallel light onto a spot, shorter focal length fresnel lenses can be used for detection purposes in combination with sensors and/or detectors.

Our standard Fresnel lenses can also be used for the same purposes but with the opposite facing design. Namely, its plano side faces the focus and the Fresnel surface faces the parallel light source.

NTKJ manufactures and sells not only off-the-shelf solar concentrator Fresnel lenses, but also manufactures custom-made solar concentrator Fresnel lens products according to our customers’ exact size and design requirements. Please contact us for more details.

The Wakasa Wan Energy Research
Center solar furnace

For Fresnel lenses, we carry two ‘types,’ “A” and “B”.

The following explains the difference between ‘A’ and ‘B’ type lenses:

– Fresnel (‘A’ type):
The diffused light from the point light source existing at the focal length position is incident on the lens plane and emits parallel light from the Fresnel side.

– Solar concentrator Fresnel (‘B’ type):
Collimated light is incident from the lens plane side and is converged to the focal point on the Fresnel side.

Below catalog is for ‘B’ type lenses.

Linear Fresnel Lens

About linear Fresnel lenses

Linear Fresnel lenses are flat cylindrical lenses that condense or diffuse light in a linear direction. They are suitable for diffusing a linear light source or for slit collection. They are widely applied in linear light sources.

NTKJ manufactures and sells not only off-the-shelf linear Fresnel lenses, but also manufactures custom-made linear Fresnel lens products according to our customers’ exact size and design requirements. Please contact us for more details.

Solar Concentrator Linear


Fresnel Lens

About solar concentrator
linear Fresnel lenses

Solar concentrator linear Fresnel lenses were developed to collect parallel light to a slit form. Solar concentrator linear Fresnel lenses are designed so that the plano side faces the sun (parallel light source), and the Fresnel surface faces photovoltaic cells or a heat collector tube (focus) as shown in the diagram below.

Our standard Fresnel lenses can also be used for the same purposes, but with the opposite facing design. Namely, its plano side faces the focus and the Fresnel surface faces the parallel light source.

NTKJ manufactures and sells not only off-the-shelf solar concentrator linear Fresnel lenses, but also manufactures custom-made Linear Fresnel lens products according to our customers’ size and design requirements. Please contact us for more details

Lenticular Lens

About lenticular lenses

Lenticular lenses are comprised of regular lines of cylindrical lenses on a flat surface that efficiently divide, focus, and diffuse light rays. This type of lens sheet is used for projection screens and stereoscopic (3D) photos.

NTKJ manufactures and sells not only off-the-shelf lenticular lenses, but also manufactures custom-made lenticular lens products according to our customers’ exact size and design requirements. Please contact us for more details.

Prism, Light-Guiding Plate


Prism Sheet

About prisms

Precision prisms are arranged on a flat surface with their angles aligned and are used to bend incident light in specified directions.

NTKJ manufactures and sells not only off-the-shelf prism products, but also manufactures custom-made prism products according to our customers’ exact size and design requirements. Please contact us for more details.

About the angles of our prisms

Prism angles for products that start with “LP” are its inclimation from the lens horizontal surface as described in fig. 1.

Prism angles for products that start with “LPV” are its apex angle as described in fig. 2.

The prism groove direction is as
described below(fig. 3).

Fly’s-eye Lens /


Micro Lens Array (MLA)

About Fly’s-eye lens / Micro Lens Array

LA multitude of identical individual lenses are vertically and horizontally arranged.

NTKJ manufactures and sells not only Fly’s-eye lens / Micro Lens Array (MLA) products on the catalog, but also manufactures custom-made Fly’s-eye lens / Micro Lens Array (MLA) products according to our customers’ requirements in sizes and design. Please contact us for more details.

NTKJ Vision

About NTKJ Vision

NTKJ Vision is a single-structure screen for high-precision rear-projection with lenticular (non-standard shape lenticular) and Fresnel lenses on one sheet. It is easily handled and features a wide horizontal field of view.

NTKJ manufactures and sells not only off-the-shelf NTKJ Vision products, but also manufactures custom-made screen products according to our customers’ exact size and design requirements. Please contact us for more details.

Custom

About our made-to-order
custom plastic lens products

NTKJ Co., Ltd. manufactures and sells custom-made plastic lens products. Our machining systems are ready to produce plastic optical products of practically any size, including Fresnel, lenticular, linear Fresnel, fly’s-eye and aspheric lenses and flat prisms. Our manufacturing expertise and equipment can accommodate a broad range of customer needs, from prototype development to mass production.

Our uniquely designed lens machining equipment can craft lenses to microscopic tolerances, satisfying diverse requests and stringent specifications. We also manufacture customized machining equipment for mass production.

We firmly believe that our distinctive capacity to produce a wide range of high-quality plastic lenses in various sizes in a timely manner will contribute to further research and development, and to the successful commercialization of your products.

PMMA is used for making lenses mainly. Polycarbonate can also be used. Please contact us for more detail.Contact us to discuss the possibility of your ideal custom product.

Examples of our
made-to-order products

  • ・Large Fresnel lenses
  • ・Small Fresnel Lenses
  • ・Large Linear Fresnel Lenses
  • ・Small Linear Fresnel Lenses
  • ・Aspheric Lenses
  • ・Fly’s-eye lenses / Lens array
  • ・Light Guiding Plates
  • ・Prism sheets
  • ・Projection Screens
  • ・Other MTO Products