Aspherical Plastic Lens Manufacturing & Plastic Molds Hinode Co., Ltd.

5-17-5 Kita-Machi, Nerima-Ku, Tokyo 179-0081 Tel:81-(0)3-3937-1341


Product Infomation

HINODE proudly offers a lineup of lens products for cameras

Finder unit

Objective lens

Movable lens


HINODE designs and manufactures a variety of optical lenses. Our lineup includes photography lenses from short focus to zoom, as well as albada-type and real image finder lenses.

Eye-piece lens

Prism


Solving even the smallest problems without compromising. This spirit is found in all of our employees and is the reason that HINODE can achieve true high quality.
At HINODE, this commitment to problem-solving and quality is upheld by all of our employees.

Support for high-performance resin molds and secondary processing in optics

Expectations for plastic lenses are becoming more demanding

The expectations for plastic lenses are becoming even more demanding in order to meet the more lightweight and compact, and higher resolution requirements. To match market trends, there are high-performance resins being researched, developed and used. And even within our own company, we are currently testing new materials and making steady strides toward mass production performance.


Advantages of plastic lenses

・Light-weight
・Low cost (approximately 1/10th the cost of glass)
・Durable against impact
・Easy to mold and process aspheric surfaces

Advances are being made in coating technology and its surface hardness is also catching up to glass lenses. Depending on the field and application, the use of plastic lenses is gaining momentum as a replacement. Various types of performance resins are being released into the market to match application and performance requirements.


<High-performance polycarbonate resins>

Conventional PC resins are used in CDs & DVDs and lenses for eyewear because it is transparent and inexpensive. Recently, there have been further advances in the development of high-grade, high-performance PC resins

EP4000/EP5000
(MITSUBISHI GAS CHEMICAL COMPANY, INC.)

These resins have an extremely low birefringence and a high refractive index. With a high fluidity, they are not only fitting for thin-wall molding, but they have superior durability. As a result, they can also be used in various lens field applications such as cellular phones with cameras, digital cameras, cameras for vehicles with strict usage conditions (such as rear-view cameras) and surveillance cameras

EP5000 EP4000
Refractive index 1.634

1.603

Abbe number 23.9 28.4
Glass transition temperature 145 121
Water absorption coefficient 0.35 0.37
Specific gravity 1.24 1.2
Birefringence 5 8
Test production -
Mass production - -

○◎:There are a mass production results.
※:There are a prototype manufacturing results.

SP-1516(TEIJIN LIMITED)

While having the same transparency as a standard PC resins, there is also less optical distortion in the molding products. In addition, it has heat resistant properties and can be molded under the same conditions as standard PC resins. Due to its durability against performance loss even under long usage conditions, it is also used not only with camera lenses but optical sensors, industrial lenses and optical films.

AD-5503(TEIJIN LIMITED)

This is a special polycarbonate resin with a low Abbe number for general optics.

SP-1516 AD5503
Refractive index 1.61

1.585

Abbe number 26 30
Glass transition temperature 156 145
Water absorption coefficient   0.2
Specific gravity 1.2 1.2
Birefringence 20 65
Test production
Mass production - -

<High-performance polyester resins>

OKP4/OKP4HT
(Osaka Gas Chemicals Co., Ltd.)

The attributes for this resin’s properties include a refractive index of more than 1.6, a low birefringence and a high fluidity. As a result, it is used with optical photography lenses and sensor covers, etc. In addition, the need for all types of aberration correction lenses such as chromatic aberration lenses in particular is expanding.

OKP4 OKP4HT
Refractive index 1.607

1.632

Abbe number 27.7 23
Glass transition temperature 121 143
Water absorption coefficient 0.2 0.2
Specific gravity 1.22 1.26
Birefringence 49 87
Test production
Mass production - -

<High-performance circular resins>

APEL(Mitsui Chemicals, Inc.)

This high-performance resin with its low birefringence has been able to acquire a significant share in the optical disk market where optical pickup lenses are used. Other applications include fθ lenses for laser printers, lenses for image sensors and also the health care field due to its chemical resistance.

TOPAS(Polyplastics Co.,Ltd.)

This resin possesses optical characteristics that are comparable to PMMA (acrylic) and a heat resistance that exceeds PC. Dimension accuracy is easy to carry out because it forms and molds smoothly.

ZEONEX
(ZEON CORPORATION)

This high-performance resin is characterized by its stable refractive index. It is widely used, as it not only has a high share in the lenses used for cellular telephone applications but is also used on next generation DVD disks, and on connectors and antennae. With its low-impurity characteristics, it is even used in the health care field for inspection equipment applications.

PMMA APEL TOPAS
Refractive index 1.49 1.54 1.533
Abbe number 57.8 56 56
Glass transition temperature 90 125 140
Water absorption coefficient 4 0.01 0.01
Specific gravity 1.19 1.04 1.02
Birefringence 20 20 20
Test production
Mass production -
ZEONEX
E48R
ZEONEX
F52R
Refractive index 1.531 1.5346
Abbe number 56 56
Glass transition temperature 139 156
Water absorption coefficient 0.01 0.01
Specific gravity 1.01 1.02
Birefringence 20 20
Test production
Mass production -

Strict pursuit of accuracy is required for molds

Over 40 years have passed since we began our work with photography lenses. HINODE will use the knowledge and experience gained in these 40 years as a base for becoming a leading pioneer in plastic lenses in the future.


Not even 1 µm of compromise is allowed in lens products. Accuracy of 0.1µm is demanded for molds, which are the basis of lens products. Today, accuracy on the scale of nanometers is being pursued. These seem like extremely severe numbers, but that is not the case. One by one, small margins of error add up to become a large margin of error, making it difficult to perform problem solving.

Offering partnerships and collaborations for short-term development projects

We are engaged in projects focusing on product sizes between Ø2 – 40, with an accuracy level of ±0.1 µm
Test production for plastic lenses in 1 month
Designs in 2 – 5 days
Wire processing in 3 – 5 days
Cutting & electric discharge processing in 3 – 7 days
Heat treatment in 1 day
Secondary surface treatment in 3 days
Main processing in 1 day
Partial finishing in 1 day
Finishing & assembly adjustments in 1 day
Molding in a half day
Correction processing in 1.5 days
Light guide & LED display windows in 12 – 16 days (No surface precision requirement)
Coaxially-symmetrical, spherical & aspherical surface lenses, light guides, AF windows with guaranteed surface precision, emitter windows, simple toroidal shaped surfaces in 13 – 17 days
Lens types with free-form surfaces in 25 – 30 days
*We deliver only products that have passed the required precision level.



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