DIOPTIC Bi-Telecentric Lenses

Recording of two identical objects at different distances with a telecentric lens (left) and a standard lens (right)

Front view of a metal profile with a telecentric lens (left) and with a standard lens (right)

Telecentric lenses are ideally suited for image processing solutions such as the measurement of components due to their imaging properties. The special position of the entrance pupil at infinity provides telecentric lenses with properties that make them particularly suitable for measurement tasks in industrial environments. DIOPTIC’s bi-telecentric lens series is additionally telecentric on the image side and can be quickly and flexibly extended to special customer requirements due to its modular design. With the double-sided telecentric lens series, you can take advantage of all the benefits of this lens type as well as other special features:

Constant magnification: No matter at what distance within the field of view an object is located, the magnification is always the same. This means that the size of an object can be determined without further information about the object distance.
Perpendicular angle of view: The angle of view of a telecentric lens is perpendicular to the image plane over the entire field of view. Surfaces and edges perpendicular to the imaging plane are not imaged. This is of great advantage especially when measuring high components and long profiles.
Low distortion: DIOPTIC telecentric lenses exhibit extremely low distortion. Therefore, test objects can be measured and characterized extremely accurately without further calibration
Variable object distance: If the specified object distance does not fit your setup, you can change it yourself using the shim rings provided with the lens. Due to the bi-telecentric design, this does not change the magnification
Adaptability: If you cannot find a suitable lens for your application, there is the possibility to develop one especially for you. Due to the modular design of our lens series this can be done with little effort.

For advice, contact: Dr. Markus Rollinger | Tel.: +49 6201 65040-16

Product overview: DIOPTIC bi-telecentric lenses

BTL 11.5 – Bi-telecentric lenses for sensor diagonal up to 2/3″ (16.9 mm)

Model	Image circle	Object circle	Magnification	Working distance	Camera mount	Data sheet	Stock	Price
BTL-11.5-25	11.5 mm	25 mm	0.46	45 mm	C – Mount	Data sheet	in stock	Send request
BTL-11.5-35	11.5 mm	35 mm	0.329	55 mm	C – Mount	Data sheet	not in stock	Send request
BTL-11.5-45	11.5 mm	45 mm	0.256	65 mm	C – Mount	Data sheet	in stock	Send request
BTL-11.5-60	11.5 mm	60 mm	0.192	80 mm	C – Mount	Data sheet	not in stock	Send request
BTL-11.5-70	11.5 mm	70 mm	0.164	95 mm	C – Mount	Data sheet	in stock	Send request
BTL-11.5-85	11.5 mm	85 mm	0.135	120 mm	C – Mount	Data sheet	not in stock	Send request
BTL-11.5-105	11.5 mm	105 mm	0.11	155 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-125	11.5 mm	125 mm	0.092	195 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-155	11.5 mm	155 mm	0.074	255 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-185	11.5 mm	185 mm	0.062	320 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-215	11.5 mm	215 mm	0.053	375 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-245	11.5 mm	245 mm	0.047	420 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-270	11.5 mm	270 mm	0.043	480 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-11.5-315	11.5 mm	315 mm	0.037	545 mm	C – Mount	Data sheet	built-to-order	Send request

BTL 18.5 – Bi-telecentric lenses for sensor diagonal up to 1.1″ (27.9 mm)

Model	Image circle	Object circle	Magnification	Working distance	Camera mount	Data sheet	Stock	Price
BTL-18.5-25	18.5 mm	25 mm	0.74	45 mm	C – Mount	Data sheet	in stock	Send request
BTL-18.5-35	18.5 mm	35 mm	0.529	55 mm	C – Mount	Data sheet	not in stock	Send request
BTL-18.5-45	18.5 mm	45 mm	0.411	65 mm	C – Mount	Data sheet	in stock	Send request
BTL-18.5-60	18.5 mm	60 mm	0.308	80 mm	C – Mount	Data sheet	not in stock	Send request
BTL-18.5-70	18.5 mm	70 mm	0.264	95 mm	C – Mount	Data sheet	not in stock	Send request
BTL-18.5-85	18.5 mm	85 mm	0.218	120 mm	C – Mount	Data sheet	not in stock	Send request
BTL-18.5-105	18.5 mm	105 mm	0.176	155 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-125	18.5 mm	125 mm	0.148	195 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-155	18.5 mm	155 mm	0.119	255 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-185	18.5 mm	185 mm	0.1	320 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-215	18.5 mm	215 mm	0.086	375 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-245	18.5 mm	245 mm	0.076	420 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-270	18.5 mm	270 mm	0.069	480 mm	C – Mount	Data sheet	built-to-order	Send request
BTL-18.5-315	18.5 mm	315 mm	0.059	545 mm	C – Mount	Data sheet	built-to-order	Send request

BTL 23 – Bi-telecentric lenses for sensor diagonal up to 4/3″ (33.9 mm)

Model	Image circle	Object circle	Magnification	Working distance	Camera mount	Data sheet	Stock	Price
BTL-23-25	23 mm	25 mm	0.92	45 mm	M42	Data sheet	not in stock	Send request
BTL-23-35	23 mm	35 mm	0.657	55 mm	M42	Data sheet	not in stock	Send request
BTL-23-45	23 mm	45 mm	0.511	65 mm	M42	Data sheet	not in stock	Send request
BTL-23-60	23 mm	60 mm	0.383	80 mm	M42	Data sheet	not in stock	Send request
BTL-23-70	23 mm	70 mm	0.329	95 mm	M42	Data sheet	not in stock	Send request
BTL-23-85	23 mm	85 mm	0.271	120 mm	M42	Data sheet	not in stock	Send request
BTL-23-105	23 mm	105 mm	0.219	155 mm	M42	Data sheet	built-to-order	Send request
BTL-23-125	23 mm	125 mm	0.184	195 mm	M42	Data sheet	built-to-order	Send request
BTL-23-155	23 mm	155 mm	0.148	255 mm	M42	Data sheet	built-to-order	Send request
BTL-23-185	23 mm	185 mm	0.124	320 mm	M42	Data sheet	built-to-order	Send request
BTL-23-215	23 mm	215 mm	0.107	375 mm	M42	Data sheet	built-to-order	Send request
BTL-23-245	23 mm	245 mm	0.094	420 mm	M42	Data sheet	built-to-order	Send request
BTL-23-270	23 mm	270 mm	0.085	480 mm	M42	Data sheet	built-to-order	Send request
BTL-23-315	23 mm	315 mm	0.073	545 mm	M42	Data sheet	built-to-order	Send request

BTL 39.2 – Bi-telecentric lenses for sensor diagonal up to 39.2 mm

Model	Image circle	Object circle	Magnification	Working distance	Camera mount	Data sheet	Stock	Price
BTL-39.2-25	39.2 mm	25 mm	1.568	45 mm	M58	Data sheet	in stock	Send request
BTL-39.2-35	39.2 mm	35 mm	1.12	55 mm	M58	Data sheet	not in stock	Send request
BTL-39.2-45	39.2 mm	45 mm	0.871	65 mm	M58	Data sheet	in stock	Send request
BTL-39.2-60	39.2 mm	60 mm	0.653	80 mm	M58	Data sheet	not in stock	Send request
BTL-39.2-70	39.2 mm	70 mm	0.56	95 mm	M58	Data sheet	in stock	Send request
BTL-39.2-85	39.2 mm	85 mm	0.461	120 mm	M58	Data sheet	not in stock	Send request
BTL-39.2-105	39.2 mm	105 mm	0.373	155 mm	M58	Data sheet	in stock	Send request
BTL-39.2-125	39.2 mm	125 mm	0.314	195 mm	M58	Data sheet	built-to-order	Send request
BTL-39.2-155	39.2 mm	155 mm	0.253	255 mm	M58	Data sheet	built-to-order	Send request
BTL-39.2-185	39.2 mm	185 mm	0.212	320 mm	M58	Data sheet	built-to-order	Send request
BTL-39.2-215	39.2 mm	215 mm	0.182	375 mm	M58	Data sheet	built-to-order	Send request
BTL-39.2-245	39.2 mm	245 mm	0.16	420 mm	M58	Data sheet	built-to-order	Send request
BTL-39.2-270	39.2 mm	270 mm	0.145	480 mm	M58	Data sheet	built-to-order	Send request
BTL-39.2-315	39.2 mm	315 mm	0.124	545 mm	M58	Data sheet	built-to-order	Send request

BTL 44 – Bi-telecentric lenses for sensor diagonal up to 44 mm

Model	Image circle	Object circle	Magnification	Working distance	Camera mount	Data sheet	Stock	Price
BTL-44-25	44 mm	25 mm	1.76	45 mm	M58	Data sheet	not in stock	Send request
BTL-44-35	44 mm	35 mm	1.257	55 mm	M58	Data sheet	not in stock	Send request
BTL-44-45	44 mm	45 mm	0.978	65 mm	M58	Data sheet	not in stock	Send request
BTL-44-60	44 mm	60 mm	0.733	80 mm	M58	Data sheet	not in stock	Send request
BTL-44-70	44 mm	70 mm	0.629	95 mm	M58	Data sheet	not in stock	Send request
BTL-44-85	44 mm	85 mm	0.518	120 mm	M58	Data sheet	not in stock	Send request
BTL-44-105	44 mm	105 mm	0.419	155 mm	M58	Data sheet	built-to-order	Send request
BTL-44-125	44 mm	125 mm	0.352	195 mm	M58	Data sheet	built-to-order	Send request
BTL-44-155	44 mm	155 mm	0.284	255 mm	M58	Data sheet	built-to-order	Send request
BTL-44-185	44 mm	185 mm	0.238	320 mm	M58	Data sheet	built-to-order	Send request
BTL-44-215	44 mm	215 mm	0.205	375 mm	M58	Data sheet	built-to-order	Send request
BTL-44-245	44 mm	245 mm	0.18	420 mm	M58	Data sheet	built-to-order	Send request
BTL-44-270	44 mm	270 mm	0.163	480 mm	M58	Data sheet	built-to-order	Send request
BTL-44-315	44 mm	315 mm	0.14	545 mm	M58	Data sheet	built-to-order	Send request