Bk7 1050-1700nm Aspheric Lens Optical Convex Lenses Customizable Manufacturer for Optics

Product Description

Product Description

A lens is made according to the law of refraction of light. A lens is a refractive mirror, with its refractive surface being two spherical surfaces (a part of a sphere), or one spherical surface and one plane of a transparent body. The images formed by the lens can be real or virtual. Lenses are widely applied in various fields such as security, vehicles, digital cameras, lasers, optical instruments, etc. With the continuous development of the market, lens technology is becoming increasingly widely used.

Working Principle 

Key Features

•Step 1: Parallel light (or divergent light) enters the convex non-spherical surface of the lens.
• Step 2: The lens's variable curvature profile refracts central and edge rays differently—compensating for the natural divergence of edge rays that occurs in spherical convex lenses.
• Step 3: All light rays converge to a single, sharp focal point, achieving clear, undistorted imaging and maximizing light utilization.
• Key Difference: Traditional spherical convex lenses have uniform curvature, leading to spherical aberration (edge rays focus at a different point than central rays); aspheric convex lenses correct this by adjusting curvature, ensuring sharp imaging with fewer components.

•Aberration-Free & Sharp Imaging: Eliminates spherical aberration, coma and astigmatism, delivering diffraction-limited sharpness and consistent full-field clarity.
• Premium Optical Materials: Optional BK7 (cost-effective for visible light), fused silica (high UV transmittance, low expansion, high laser threshold), and sapphire (hard, scratch-resistant for harsh environments).
• High Efficiency & Compact Design: One aspheric convex lens replaces multiple spherical convex lenses, reducing system size/weight, light loss and boosting overall efficiency.
• Strict Precision Control: Precise control of surface profile (RMS ≤ 0.01μm), curvature and thickness with tight tolerances for perfect optical system compatibility.
• Durable & Stable: Precision-polished surface (roughness ≤ 5Å), optional AR coating (transmittance up to 99.5%), resistant to high temperature, humidity and corrosion for long-term stability.

Specification

PRODUCT NAME	Aspheric Lens
PRODUCT SIZE	0.1 - 600mm
EFFECTIVE FOCAL LENGTH	250mm
DIAMETER TOLERANCE	+0.0/-0.1mm
TRANSMITTANCE	95%
TYPE	Optical Lens

Optical Applications‌

A lens is a type of lens where the thickness of the central part is much greater than the curvature radii of its two surfaces. Optical glass has high transparency, purity, colorlessness, uniform texture, and good refractive ability, making it the main raw material for lens production. The lens is the most fundamental optical component of the optical system of a microscope. Components such as the objective lens, eyepiece lens, and condenser lens are all composed of single or multiple lenses. Depending on their different shapes, they can be divided into convex lenses (positive lenses) and concave lenses (negative lenses). When a beam of light parallel to the principal axis passes through a convex lens, it converges at a point, which is called the "focus". The plane passing through the focus and perpendicular to the optical axis is called the "focal plane". There are two foci, the one in the object space is called the "object space focus", and the focal plane at this point is called the "object space focal plane"; conversely, the one in the image space is called the "image space focus", and the focal plane at this point is called the "image space focal plane". Light passing through a concave lens forms a virtual image upright, while a convex lens forms a inverted real image. Real images can be displayed on a screen, but virtual images cannot.

Company Profile

FUSHI

prise integrating R&D, production, sales, and after-sales service. Since its establishment in 2012, the company has been dedicated to technological innovation and industrial application in the field of optical components, with its manufacturing base located in China's core optical industry zone. The product portfolio covers a full range of optical basic components, including lenses, prisms, mirrors, optical windows, and filters, with particular technical expertise in the design and manufacturing of diffraction gratings.  
 
In 2017, Fushi Optics established a professional optical laboratory in Dongli District, Tianjin, committed to integrating optical theoretical research with engineering practice. After years of technical accumulation, the laboratory has gained wide academic recognition for its research achievements in spectral analysis, precision optical processing, and other fields, forming an integrated "industry-academia-research-application" technological innovation system. It continues to provide high-performance optical solutions for the optoelectronic industry.
 

Customization Services

As a professional custom manufacturer of aspheric convex lenses, we provide one-stop customization solutions to fully meet your unique application needs, with mature technology and fast response:
• Size & Profile Customization: Customizable lens diameter (φ5mm–200mm+), focal length, convex surface curvature, and chamfer size, adapting to different optical path and installation requirements.
• Material Customization: Select the optimal substrate (BK7, fused silica, sapphire, etc.) according to your application wavelength (UV/VIS/NIR) and environmental conditions (high temperature, corrosion resistance).
• Coating Customization: Optional AR coating (for high transmittance), HR coating, or special coatings to optimize optical performance for specific wavelengths and scenarios.
• Technical Customization: Customize surface precision, curvature tolerance, and optical performance parameters; provide personalized design solutions for complex application scenarios (e.g., laser beam shaping, high-resolution imaging).
• Fast Service: Free technical consultation, 24-hour quotation, sample customization, and support for small-batch and large-batch orders, ensuring products fully match your requirements.

Packing & Delivery

We attach great importance to every detail in production and communication. Should you have any questions, suggestions, or comments, please do not hesitate to share them with us. Your feedback is invaluable in our pursuit to become a worthy, trusted, and reliable supplier. Thank you for your visit.

FAQ

Q: How can I get samples from you?
A: Just send us your requirements, and we will send samples accordingly. 
 
Q: How long is your delivery time? · 
A: Regarding inventory, it is 3 working days;For customized one, it's about 15-25 working days, depending on exact quantity and order date. 
 
Q: Can I customize the products based on my requirements?
A: Yes, we can customize the material, specifications and optical coating for your optical components as per your requirements.
Q: Are you a factory? 
A: Yes, we are a professional manufacturer of optical components. We have more than 20 years of experience in optical cold working.
 
Q: How do you control the quality?
A: More than four times of quality inspection during the production process; we can provide the Quality Test Report.